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  • 1
    Online Resource
    Online Resource
    New York :Nova Science Publishers, Incorporated,
    Keywords: Amino acids -- Analysis. ; Enantiomers -- Analysis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (216 pages)
    Edition: 1st ed.
    ISBN: 9781612094151
    Series Statement: D-Amino Acids: Practical Methods and Protocols
    DDC: 572/.65
    Language: English
    Note: Intro -- D-AMINO ACIDS: PRACTICAL METHODS AND PROTOCOLS -- D-AMINO ACIDS: PRACTICAL METHODS AND PROTOCOLS -- CONTENTS -- PREFACE -- PURIFICATION OF ALANINE RACEMASE FROM HELICOBACTER PYLORI -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- DISRUPTION OF ALANINE RACEMASE GENE OF SCHIZOSACCHAROMYCES POMBE -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- ASSAY METHOD FOR ASPARTATE RACEMASE ACTIVITY BY HPLC -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- SERINE RACEMASE OF SILKWORM, BOMBYX MORI -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- RECOMBINANT SERINE RACEMASE PREPARATION -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- D-AMINO ACID OXIDASE ACTIVITY ASSAYS -- 1. INTRODUCTION -- 2. MATERIALS -- 1. Chemicals -- 2. Enzymes -- 3. Solutions -- 4. Equipment -- 3. METHODS -- 1. Polarographic Assay with D-α-Amino Acids -- 2. Spectrophotometric Assay with D-α-Phenylglycine -- 3. Peroxidase-Coupled Assay -- 4. Determination of Steady-State Kinetic Parameters of the Reactions -- 4. RESULTS -- Activity of DAAO with D-Amino Acids as Measured with the Polarographic and Peroxidase-Coupled Assays -- Use of the Spectrophotometric Assay with D-α-Phenylglycine to Characterize the Isoforms found in DAAO Preparations -- 5. NOTES -- ACKNOWLEDGMENTS -- REFERENCES -- HISTOCHEMICAL DETECTION OF D-AMINO-ACID OXIDASE ACTIVITY IN RAT BRAIN -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- EVALUATION OF CHIRAL INVERSION OF D-AMINO ACID BY STABLE ISOTOPE METHODOLOGY -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 3.1. Resolution of DL-[2H7]leucine -- 3.1.1. Preparation of N-acetyl-DL-[2H7]leucine. , 3.1.2. Hydrolysis of N-acetyl-DL-[2H7]leucine by acylase -- 3.1.3. Acid Hydrolysis of N-acetyl-D-[2H7]leucine -- 3.2. Preparation of Sodium [4,5,5,5,6,6,6-2H7]2-oxo-4-methylpentanoate ([2H7]KIC) -- 3.3. Dose Experiments -- 3.4. Sample Preparation for GC-MS -- 3.5. GC-MS-SIM -- 3.5.1. Apparatus -- 3.5.2. Determination of Labeled and Non-Labeled Leucine Enantiomers -- 3.5.3. Determination of Labeled and Non-Labeled KIC -- 3.6. Data Analysis -- 3.6.1. Pharmacokinetic Parameters -- 3.6.2. Extent of Conversion -- 4. RESULTS -- 4.1. Synthesis of D-[2H7]leucine, L-[2H7]leucine and [2H7]KIC -- 4.2. GC-MS -- 4.2.1. Simultaneous Determination of the D- and L-enantiomers of [2H7]leucine and leucine -- 4.2.2. Determination of [2H7]KIC and KIC -- 4.3. Estimation of the Extent of Conversion -- 5. NOTES -- REFERENCES -- ENGINEERING THE SUBSTRATE SPECIFICITY OF D-AMINO ACID OXIDASE BY RATIONAL AND DIRECTED EVOLUTION METHODS -- 1. INTRODUCTION -- 1.1. Rational Design -- 1.2. Directed Evolution (Site-Saturation Mutagenesis and Error-Prone PCR) -- 2. MATERIALS -- 2.1. Molecular Biology -- 2.2. SDM (Rational Design) -- 2.3. SSM (Irrational Design of Specific Positions) -- 2.4. EP-PCR (Irrational Design) -- 2.5. Screening of Mutants Libraries -- 3. METHODS -- 3.1. SDM (Rational Design) of yeast DAAO [14,15] -- 3.2. SSM (Irrational Design of Specific Positions) of yeast DAAO -- 3.3. EP-PCR (Irrational Design) of yeast DAAO [16,17] -- 3.4. Screening of Mutants Libraries -- 4. RESULTS -- 4.1. SDM (rational design) -- 4.2. SSM (Irrational Design of Specific Positions) -- 4.3. EP-PCR (Irrational Design) -- 5. NOTES -- ACKNOWLEDGMENTS -- REFERENCES -- TRANSFORMATION OF PLANTS WITH D-AMINO ACID RESISTANCE SELECTABLE MARKERS -- 1. INTRODUCTION -- 2. MATERIALS AND METHODS -- D-Amino Acid Oxidase -- D-Serine Dehydratase -- 3. RESULTS -- 4. NOTES -- REFERENCES. , SCREENING FOR MUTANT MICE LACKING D-AMINO-ACID OXIDASE ACTIVITY -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- ASTROGLIAL EXPRESSION OF D-AMINO ACID OXIDASE: REGIONAL AND CELL-TYPE SPECIFIC EXPRESSION -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Cell Cultures -- 2.2. Immunocytochemistry -- 2.3. Reverse Transcriptase-PCR (RT-PCR) -- 3. METHODS -- 3.1. Cell Cultures -- 3.1.1. Preparation of PDL-Coated Culture Flask -- 3.1.2. Mixed Glial Cells -- 3.1.3. Type-1 Astrocytes -- 3.1.4. Microglia -- 3.1.5. Purification of O-2A Progenitor Cells by Panning -- 3.1.6. Type-2 Astrocytes -- 3.2. Immunocytochemistry -- 3.3. RT- PCR -- 4. RESULTS -- 5. NOTES -- REFERENCES -- D-AMINO ACID OXIDASE: A VERSATILE TOOL TO STUDY THE FUNCTION OF THE GLIAL-DERIVED NEUROMODULATOR D-SERINE AT GLUTAMATERGIC SYNAPSES -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Animals -- 2.2. Cell Cultures -- 2.2.1. Media and Chemicals -- 2.2.2. Small Material and Equipment for Cell Cultures -- 3. METHODS -- 3.1. Preparation of Hippocampal Slices for Patch-Clamp Recordings -- 3.2. Neuron-Astrocyte Cultures -- 3.2.1. Dissection of Hippocampi for Neurons Cultures -- 3.2.2. Dissociation of Hippocampi for Astrocytes Cultures -- 3.2.3. Preparation and Culture of Hippocampal Neurons -- 3.2.4. Mixed Cultures -- 3.3. Electrophysiological Recordings -- 3.3.1. Recording Apparatus -- 3.3.2. The Whole-Cell Configuration -- 3.4. Perfusion Media and Intracellular Solutions -- 3.4.1. Composition of the Extracellular Solutions -- 3.4.2. Perfusion System and Application of Test Substances -- 3.4.3. Composition of the Intracellular Solution -- 3.5. Treatment of Brain Slices or Cultures with D-Amino Acid Oxidase -- 3.6. Protocols of Electrophysiological Recordings and Brain/Cells Treatment with DAAO. , 3.6.1. Basic Considerations for Recording Synaptic Activity from Brain Slices or Cultures -- 4. RESULTS -- 4.1. Brain Slices Experiments -- 4.2. Electrophysiological Recordings Experiments in Cultures -- ACKNOWLEDGMENTS -- REFERENCES -- RESONANCE RAMAN STUDY ON CHARGE-TRANSFER COMPLEXES OF PORCINE D-AMINO ACID OXIDASE -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Enzymes -- 2.2. Chemicals -- 3. METHOD -- 3.1. Measurements of Raman and Resonance Raman Spectra -- 3.2. Sample Preparation -- 4. RESULTS -- 5. NOTES -- REFERENCES -- IMMUNODETECTION OF D-ASPARTATE OXIDASE -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 3.1. Affinity Purification of Anti-DASPO -- 3.2. Immunoblotting Using Anti-DASPO -- 3.3. Immunoprecipitation of DASPO from Tissues -- 4. RESULTS -- 5. NOTES -- REFERENCES -- HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC DETERMINATION OF D-ASPARTATE OXIDASE ACTIVITY IN RAT TISSUES -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- CLONING OF THE HUMAN BRAIN D-ASPARTATE OXIDASE CDNA AND ITS EXPRESSION IN ESCHERICHIA COLI -- 1. INTRODUCTION -- 2. MATERIALS AND METHODS -- Isolation of Human Brain D-Aspartate Oxidase cDNA -- 1. Materials -- 2. Methods -- Construction of Expression Plasmid -- 1. Materials -- 2. Methods -- Expression and Purification of D-Aspartate Oxidase -- 1. Materials -- 2. Methods -- 3. RESULTS -- 4. NOTES -- REFERENCES -- METHODS FOR N-ACYL-D-AMINO ACID AMIDOHYDROLASE RESEARCH -- 1. INTRODUCTION -- 2. MATERIALS -- a. Screening and Assay -- b. Gene Cloning -- 3. METHODS -- 3-1. N-Acetyl-D-amino Acid Synthesis -- 3-2. Culture Condition -- a. Screening for Microorganisms Producing N-Acyl-D-Amino Acid Amidohydrolase -- b. Enzyme Production -- 3-3. Assay Methods for N-Acyl-D-Amino Acid Amidohydrolase -- a. TNBS Method -- b. D-Amino Acid Oxidase Method -- c. HPLC -- d. Ninhydrin Method. , 3-4. Gene Cloning of N-Acyl-D-Amino Acid Amidohydrolase -- a. Shotgun Cloning by the D-Amino Acid Oxidase Method -- b. Gene Amplification by PCR Using Mixed Primers Designed Based on the Conserved Amino Acid Sequence -- 4. RESULTS -- 5. NOTES -- REFERENCES -- ACTIVITY MEASUREMENT OF HYDANTOIN RACEMASE ENZYME: A KEY FOR THE PRODUCTION OF OPTICALLY PURE D-AMINO ACIDS -- 1. INTRODUCTION -- 2. MATERIALS -- 1. Substrate Synthesis -- 2. Activity Assay -- 3. METHODS -- 1. Substrate Synthesis -- 2. Activity Assay -- 4. RESULTS -- 5. NOTES -- 1. Substrate Synthesis -- 2. Activity Assay -- REFERENCES -- ENZYMES ACTING ON D-AMINO ACID AMIDES -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 1. Synthesis of D-Alanine Amide, (D-Phe)4 and other Substrates for the Characterization of the Enzymes -- 2. Screening for D-Aminopeptidase (DAP) [12,13] -- 3. Activity Measurement of DAP -- 4. Preparation of DAP -- 5. Screening (D-Phe)4 Degrading Microorganisms for Alkaline D-Peptidase (ADP) -- 6. Activity Measurement of ADP -- 7. Cloning of the adp Gene -- 4. RESULTS -- 1. Substrate Specificity and Distinguishing Features of D-Aminopeptidase (DAP) -- 2. Structure of DAP -- 3. Features of Alkaline D-Peptidase (ADP) -- 4. Substrate Specificity of ADP -- 5. Structure of ADP -- REFERENCES -- ACTIVITY ON D-TRYPTOPHAN ATTRIBUTABLE TO TRIVIAL CONFORMATIONAL CHANGE OF TRYPOTPHANASE IN HIGHLY CONCENTRATED AMMONIUM PHOSPHATE SOLUTION -- 1. INTRODUCTION -- 2. MATERIALS -- 1. Salts, Reaction Mixture and Enzyme Assay -- 2. Resolution of free D-Trp -- 3. Fluorescence and Circular Dichroism Spectrophotometers -- 3. METHODS -- 1. Effect of Different Salts on D-tryptophan Activity -- 2. Dependence on Reaction Temperature -- 3. Analysis of free D-Trp -- 4. Measurement of Fluorescence -- 5. Measurement of Circular Dichroism -- 6. D-Trp as a Competitive Inhibitor -- 4. RESULTS. , 5. NOTES.
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  • 2
    Online Resource
    Online Resource
    New York :Nova Science Publishers, Incorporated,
    Keywords: Amino acids -- Analysis. ; Enantiomers -- Analysis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (142 pages)
    Edition: 1st ed.
    ISBN: 9781613243299
    Series Statement: D-Amino Acids: Practical Methods and Protocols
    DDC: 572/.65
    Language: English
    Note: Intro -- D-AMINO ACIDS: PRACTICALMETHODS AND PROTOCOLS -- CONTENTS -- PREFACE -- AN ESSAY ON D-AMINO ACIDS:RETROSPECTION AND PERSPECTIVE -- 1. INTRODUCTION: NATURALOCCURRENCE OF D-AMINO ACIDS -- 2. METABOLISM OF D-AMINO ACIDS -- 1) Oxidative Deamination Pathway -- 2) Dehydrogenation Pathway -- 3) Racemization Pathway -- 4) Transamination Pathway -- 3. ENZYMOLOGICAL ASPECTS OFD-AMINO ACID METABOLISM -- 4. PERSPECTIVE -- REFERENCES -- DETECTION OF THE SPECIFIC D-ASPARTICACID RESIDUES IN PROTEIN -- 1. INTRODUCTION -- A. LENS: TO SEARCH THE SPECIFIC ASP RESIDUES IN LENSPROTEIN BY BIOCHEMICAL ANALYSIS -- A-1. Materials -- A-2. Methods -- A-2-1. The Identification of D-Asp Containing Protein in Lens -- A-2-2. Purification of Alpha A- and Alpha B-Crystallins from Lenses of ElderyDonors -- A-2-3. The Determination of the D-Asp Sites in Human Alpha A- orAlpha B-crystallin -- A-2-4. Method for the Determination of D/L Ratio of Amino Acids inProtein or Peptides -- A-3. Results -- A-3-1. The Specific Sites of D-Asp Residues in Alpha A- orAlpha B-Crystallins -- A-3-2. Mechanism of D-Asp and Beta-Asp Formation in Protein -- B. SKIN: DETECTION OF D-BETA-ASP-CONTAININGPROTEIN IN SKIN BY IMMUNOHISTOCHEMICAL ANALYSISUSING ANTI D-BETA-ASP-CONTAINING PROTEIN ANTIBODY -- B-1. Materials -- B-2. Methods -- B-3. Results -- C. DETECTION OFD-BETA-ASP-CONTAINING PROTEIN IN CELLS -- C-1. Materials -- C-2. Methods -- C-2-1. The Culture of the N/N1003A Cell Line -- C-2-2. Two-Dimensional Gel Electrophoresis -- C-2-3. Western Blot -- C-2-4. Image Analysis -- C-2-5. In-Gel Digestion -- C-2-6. Identification of D-beta-Asp-Containing Proteins by MALDI-TOF-MS -- C3 Results -- PROSPECTS -- REFERENCES -- DETECTION OF AMYLOID β PEPTIDES WITHL-ISOASPARTATE IN ALZHEIMER'S DISEASE -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 3-1. Peptide Synthesis [6,7]. , 3-2. Preparation of Anti-isoAsp Aβ Antibodies [8,9] -- 3-3. Specificity of Anti-isoAsp Aβ Antibodies on Dot Blot Analysis [9] -- 3-4. Immunohistochemistry [8-10] -- 4. RESULTS -- Characterization of Anti-isoaspartyl Aβ Antibodies -- Isoaspartate Formation of Aβ in Senile Plaques and Vascular Amyloid -- REFERENCES -- DETECTION OF D-AMINO ACID IN PEPTIDESBY RP-HPLC AND MASS SPECTROMETRY -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- REFERENCES -- DETERMINATION OF D-AMINO-ACIDRESIDUES IN PEPTIDES FROM ANIMALVENOM BY NMR: APPLICATION TOPLATYPUS VENOM PEPTIDE OVCNPS -- 1. INTRODUCTION -- 2. MATERIALS -- Venom Samples -- Reverse-Phase HPLC -- Synthetic OvCNPa and OvCNPb -- NMR Spectroscopy -- 3. METHODS -- Preparation of Crude Venom and Venom Gland Extracts -- Reverse-phase HPLC -- NMR Spectroscopy -- 4. RESULTS -- 5. NOTES -- REFERENCES -- PROTEIN L-ISOASPARTYL-OMETHYLTRANSFERASECATALYZES IN SITUFORMATION OF D-ASPARTATE ANDD-ISOASPARTATE IN PROTEINS -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 1. Acid Hydrolysis of Proteins and Peptides -- 2. Derivatization of Amino Acids with OPA-NAC Reagent -- 3. HPLC-Fluorescence Analysis of derivatized Amino Acids -- 4. Recommendations Regarding Blanks -- 5. Correcting for Acid Hydrolysis-Induced Racemization -- 4. RESULTS -- 5. NOTES -- REFERENCES -- PURIFICATION OF A NOVELMAMMALIAN PROTEINASE FOR D-ASPARTATECONTAININGPROTEIN, D-ASPARTYLENDOPEPTIDASE (DAEP) -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 1. Proteolytic Assay for DAEP -- 2. Purification of DAEP from Mouse Liver -- 4. RESULTS -- 5. REFERENCES -- MICRO-PURIFICATION AND STRUCTURALASSAY OF POLY-γ-GLUTAMATE,A D-AMINO ACID-CONTAINING BIOPOLYMER -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 3.1. Anion-exchange Chromatography of PGA -- 3.2. Micro-purification of PGA -- 3.3. Determination and Stereochemical Assay of PGA. , 3.4. Molecular-Size Estimation of PGA (FDNB method) -- 4. RESULTS -- 5. NOTES -- REFERENCES -- ESTIMATION OF CHRONOLOGICAL AGEUSING THE ASPARTIC ACID RACEMIZATIONMETHOD ON DENTIN SAMPLES -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS [13] -- 4. RESULTS -- Differences in the Degree of Racemization in Dentin from Different Partsof the Tooth (Upper Central Incisor) -- Estimation of Age from Whole Dentin -- 5. NOTES -- REFERENCES -- THE USE OF D-AMINO ACIDSIN PEPTIDE DESIGN -- 1. INTRODUCTION -- 2. CONFORMATIONAL CHARACTERISTICS OF D-AMINO ACIDS -- 3. β-HAIRPIN DESIGN -- 4. D-AMINO ACID AS HELIX TERMINATION SIGNALS -- 5. GUEST D-AMINO ACIDS INRIGHT-HANDED HELICAL SEGMENTS -- 6. ALTERNATING LD SEQUENCES -- 7. CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- CELLULAR APPROACH OF THE BIOGENESIS OFD-AMINO-ACID-CONTAINING PEPTIDES INEUKARYOTES: THE CRUSTACEAN MODEL -- ABSTRACT -- INTRODUCTION -- THE CRUSTACEAN HYPERGLYCEMIC HORMONE FAMILYAND THE X-ORGAN-SINUS GLAND COMPLEX -- CHARACTERIZATION OF A D-AA RESIDUE IN CRUSTACEANHYPERGLYCEMIC HORMONE SEQUENCES -- CELLULAR STUDY OF PHE3 ISOMERIZATION -- CHARACTERIZATION OF A D-AA RESIDUE INVITELLOGENESIS INHIBITING HORMONE SEQUENCE -- CELLULAR STUDY OF TRP4 ISOMERIZATION -- CONCLUDING REMARKS -- AKNOWLEDGMENTS -- REFERENCES -- DETECTION OF D-β-ASP-CONTAINING PROTEINSIN PARAFFIN-EMBEDDED OCULAR SAMPLESUSING ANTI-D-β-ASP-CONTAINING PROTEINANTIBODIES -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- Immunohistochemical Localization of D-β-Asp-Containing Proteins inAged Eyes -- Lens -- Iris-Ciliary Body -- Retina-Choroid-Sclera -- Immunohistochemical Localization of D-β-Asp-Containing Proteins inAge- and UV-Related Ocular Diseases -- Pinguecula -- Age-Related Macular Degeneration -- REFERENCES -- INDEX.
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  • 3
    Online Resource
    Online Resource
    New York :Nova Science Publishers, Incorporated,
    Keywords: Amino acids -- Analysis. ; Enantiomers -- Analysis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (265 pages)
    Edition: 1st ed.
    ISBN: 9781613243282
    Series Statement: D-Amino Acids: Practical Methods and Protocols
    DDC: 572/.65
    Language: English
    Note: Intro -- D-AMINO ACIDS: PRACTICALMETHODS AND PROTOCOLS -- CONTENTS -- PREFACE -- A SYSTEMATIC APPROACH TOTHE BRAIN D-SERINE SYSTEM -- 1. INTRODUCTION -- 2. QUANTITATIVE ASSAY OF D-SERINEIN THE CENTRAL NERVOUS SYSTEM -- 2.1. Dissection of the Brain Areas -- 2.2. GC and GC-MS Analysis -- 2.2.1. Reagents [5,6] -- 2.2.2. GC Analysis [5,6] -- 2.2.3. MS Analysis [5] -- 2.3. HPLC Analysis -- 2.3.1. Reagents [7,8] -- 2.3.2. HPLC Analysis [7,8] -- 3. RELEASE MECHANISM -- 3.1. In Vivo Microdialysis -- 3.2. Efflux of D-Serine Preloaded in the Xenopus Oocyte -- 4. BINDING SITE -- 4.1. DCK-Insensitive D-Serine Biding Site -- 4.1.1. Membrane Preparation [16] -- 4.1.2. [3H]D-Serine Binding Experiments [16] -- 5. UPTAKE ACTIVITY -- 5.1. Uptake by Synaptosomal P2 Fraction Isolated from Fresh Rat Brain -- 5.1.1. Tissue Preparation [18] -- 5.1.2. Uptake Experiments [18] -- 5.2. Uptake by C6 Glioma Cells -- 5.2.1. Culture of Rat Glioma C6BU-1 Cells [17] -- 5.2.2. Uptake experiments [17] -- 6. DIFFERENTIAL CLONING -- 6.1. RNA Finger Printing by RAP-PCR -- 6.2. Semiquantitave Co-Amplification RT-PCR [19,20] -- 7. FUNCTIONAL CLONING USING XENOPUS OOCYTES -- 7.1. Construction and Screening of Rat Cerebral Neocortex cDNA Library[21] -- 7.2. Expression Screening in Xenopus Oocytes [21] -- 7.3. Uptake Assay of D-Serine [21] -- 7.4. Semi-Quantitative RT-PCR (see also 6.3.) -- 7.5. Expression and Functional Assay of dsm-1 in Xenopus Oocyte -- 8. BEHAVIORAL STUDIES -- 8.1. Intraventricular Injection -- 8.2. Behavioral Ratings -- 8.3. Evaluation of Anti-Ataxic Effect by Falling Index -- 9. CHEMICALS -- 10. ETHICS -- ACKNOWLEDGEMENTS -- REFERENCES -- IMMUNOHISTOCHEMICAL STUDY OF D-SERINE -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 3.1. Preparation of Antigen (D-serine-glutaraldehyde-albumin conjugate)for Immunization -- 3.2. Purification of D-Serine Antibody. , 3.2.1: Making Affinity Columns -- 3.2.2: Immunoaffinity Chromatography -- 3.2.3: Checking the Crossreactivities -- 3.2.4: Further Purification if Necessary -- 3.2.5: Storage of Antibody -- 3.3. Tissue preparation -- 4. RESULTS -- 5. DISCUSSION -- 6. NOTES -- REFERENCES -- IMMUNOHISTOCHEMISTRYFOR D-SERINE IN BRAIN -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. For Purifying the Antibody and Testing the Antibody by dot Blot -- 2.2. For Using the Purified D-Serine Antibody for Immunohistochemistry -- 3. METHODS -- 3.1. Purifying and Testing the Antibody -- 3.1.1. Making Conjugates and Beads for Purification and Specificity Testing -- 3.1.2. Testing specificity by Dot Blot -- 3.2. Using the Purified Antibody for Immunohistochemistry -- 4. RESULTS -- 5. NOTES -- REFERENCES -- BRAIN SLICE PREPARATION FOREVALUATION OF THE PATHOPHYSIOLOGICALFUNCTIONS OF D-SERINE -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- NEPHROTOXICITY OF D-SERINE IN RATS -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- ACKNOWLEDGEMENTS -- REFERENCES -- PREPARATION OF A POLYCLONALANTISERUM AGAINST D-ASPARTATE -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Preparation of Immunogen: -- 2.1.1. Conjugation of D-Asp and BSA via Glutaraldehyde -- 2.1.2. Antigen and Adjuvant Peptide Co-Adsorbed on Gold Particles -- 2.2. Production of the Polyclonal Antiserum in Rabbit -- 2.2.1. Subcutaneous Immunization -- 2.2.2. Bleeding from the Ear Artery -- 2.3. Purification of the D-Asp Antibody by Affinity Chromatography -- 2.3.1. Conjugation of D-Asp to CNBr-Activated Sepharose 4B -- 2.3.2. Purification of D-Asp Antibody -- 2.4. Dot-Blot Assay -- 2.5. Immunohistochemistry -- 3. METHODS -- 3.1. Preparation of Immunogen: -- 3.1.1. Conjugation of D-Asp and BSA via Glutaraldehyde. , 3.1.2. Antigen and adjuvant peptide co-adsorbed on gold particles -- 3.2. Production of the Polyclonal Antiserum in Rabbit -- 3.2.1. Subcutaneous Immunization -- 3.2.2. Intravenous Immunization -- 3.2.3. Bleeding from the Ear Artery -- 3.2.4. Preparation of Antiserum from Whole Blood -- 3.3. Purification of the D-Asp Antibody by Affinity Chromatography -- 3.3.1. Conjugation of D-Asp to CNBr-Activated Sepharose 4B -- 3.3.2. Purification of the D-Asp Antibody -- 3.4. Dot-blot Assay -- 3.5. Immunohistochemistry -- 4. RESULTS -- 5. NOTES -- ACKNOWLEDGEMENTS -- REFERENCES -- VESICULAR STORAGE IN AND SECRETION OFD-ASPARTATE FROM NEUROENDOCRINE CELLS -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Reagents and Materials for Coating Coverslips with poly-L-lysine -- 2.2. Reagents for Immunohistochemistry -- 2.3. Reagents for Cell Culture -- 2.4. Reagents for Measurement of Vesicular Storage of D-Aspartate -- 2.5. Reagents for Measurement of Secretion of D-Aspartate -- 2.6. Reagents and Materials for Concentration of Acidic Amino Acids -- 2.7. Reagents and Materials for Quantitative Analysis of D-Aspartate byHPLC [see Ref. 13] -- 3. METHODS -- 3.1. Coating Coverslips with Poly-L-lysine -- 3.2. Immunohistochemistry -- 3.3. Cell Culture -- 3.4. Vesicular Storage of D-Aspartate -- 3.5. Exocytosis of D-Aspartate -- 3.6. Concentration of Acidic Amino Acids -- 3.7. Quantitative Analysis of D-Aspartate by HPLC -- 4. RESULTS -- 5. NOTE -- REFERENCES -- D-ASPARTATE IN FROG HARDERIAN GLAND -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- THE ENDOCRINE REGULATION OF THE TESTISIS MEDIATED BY D-ASPARTIC ACID:A STUDY IN THE LIZARD PODARCIS S. SICULA -- 1. INTRODUCTION -- 2. MATERIALS -- Animals -- In Vivo Experimental Procedures on the Lizards: -- Sex Steroid Assay in Plasma and Testis -- Specific Determination of D-Aspartic Acid. , Biosynthesis of D-Asp by a Racemase Activity -- 3. METHODS -- Administration of D-Asp into Lizards -- Sex Steroid Assay in Plasma and Testis -- Specific Determination of D-Aspartic Acid -- Biosynthesis of D-Asp by a Racemase Activity -- Statistical Analysis -- 4. RESULTS -- 5. NOTES -- REFERENCES -- D-ASPARTIC ACID IN THE NERVOUS SYSTEM OFA MOLLUSC: AN IMMUNOHISTOCHEMICALPROTOCOL -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- ACKNOWLEDGEMENTS -- REFERENCES -- ANALYSIS, DISTRIBUTION, ANDPHYSIOLOGICAL FUNCTIONS OF FREED-ALANINE IN AQUATIC INVERTEBRATES -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 1. Analyses of D- and L-Amino Acids in Invertebrate Tissues -- 2. Distribution of D-Alanine in Aquatic Invertebrate -- 3. Physiological Function of D-Alanine as a Potent Osmolyte inInvertebrate Tissues -- 4. Other Possible Physiological Functions of Free D-Alanine in AquaticInvertebrates -- 5. Biosynthesis of D-Alanine in Aquatic Invertebrates -- 6. Utilization of D-Amino Acids in Fish -- 5. CONCLUSION -- REFERENCES -- D-GLUTAMIC ACID INDUCED MUSCLECONTRACTION IN SILKWORM LARVA -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- PRIMARY STUDY OF D-AMINOACID ACCUMULATION SYSTEM -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- D-AMINO ACIDS AND IMMUNE RESPONSE -- 1. INTRODUCTION -- 2. IMMUNOGENICITY -- 3. ANTIGENIC SPECIFICITY AT THE B CELL LEVEL -- 4. PREFERENTIAL FORMATION OFANTIBODIES TO D-AMINO ACID SEQUENCES -- 5. THYMUS INDEPENDENCE -- 6. T-CELL IMMUNITY -- 7. RETRO-INVERSO PEPTIDES -- 8. AN L-POLYMER, BUT NOT ITSD-ENANTIOMER, AS A DRUG AGAINST MS -- 9. CONCLUDING REMARKS -- REFERENCES. , CONSIDERATIONS FOR THE USE OF 'RAPID'CELL SUPERFUSION AND VOLTAGE CLAMP TOINVESTIGATE THE ROLE OF RARE AMINOACIDS IN SYNAPTIC TRANSMISSION -- 1. INTRODUCTION AND THEORETICAL CONSIDERATIONS -- 2. MATERIALS -- 3. METHODS -- Whole-Cell Voltage Clamp -- Application of Amino Acids -- 4. RESULTS -- 5. NOTES -- Synaptic Complexity -- Application of Amino Acids -- AKNOWLEDGEMENTS -- REFERENCES -- ARE D-AMINO ACIDSPREVALENT AMONG EUKARYOTES? -- 1. FREE AMINO ACIDS -- 2. PEPTIDE AMINO ACIDS -- REFERENCES -- NUTRITIONAL EVALUATION OF D-AMINO ACIDS -- 1. INTRODUCTION -- 2. METHODS -- Growth Assay in Mice -- 3. RESULTS -- D-Alanine -- D-Arginine -- D-Aspartic Acid -- D-Cysteine -- D-Cystine -- D-Histidine -- Lanthionine (LAN) Isomers -- D-Lysine and Lysinoalanine (LAL) Isomers -- D-Methionine -- D-Phenylalanine -- D-Proline -- Selenomethionine Isomers -- D-Serine -- D-Threonine -- D-Tryptophan -- D-Tyrosine -- D-Valine -- 4. NOTES -- ACKNOWLEDGMENTS -- REFERENCES -- D-AMINO ACIDS IN FOOD -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 3.1. GC -- 3.2. HPLC -- 3.3. CE -- 3.4. Sensor and Biosensor -- 3.5. Yoghurt Production -- 3.6. Yoghurt Sample Preparation for Amino Acid Analysis -- 3.7. Cheese Sample Preparation for Amino Acid Analysis -- 3.8. In Vivo Experiments -- 3.9. Serum Sample Preparation for Amino Acid Analysis -- 4. RESULTS AND DISCUSSION -- 4.1. Methods for Chiral Separation of D,L-Amino Acids -- 4.2. D-Amino Acids formed in Technological Processes (Heat Treatments) -- 4.3. D-Amino Acids as Markers of Contamination in Unfermented Foods -- 4.4. D-Amino Acids in Fermented Foods -- 4.4.1. Cheese -- 4.4.2. Yoghurt -- 4.5. Metabolic Fate of Dietary D-Amino Acids -- 5. CONCLUSIONS -- ACKNOWLEDGEMENTS -- REFERENCES -- D-AMINO ACID DETERMINATION IN FOODS,BEVERAGES, AND BIOLOGICAL SAMPLES -- 1. INTRODUCTION -- 2. DETERMINATION OF NATIVE AMINO ACIDS. , 3. DERIVATIZATION METHODS FOR HPLC ANALYSIS.
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  • 4
    Online Resource
    Online Resource
    New York :Nova Science Publishers, Incorporated,
    Keywords: Amino acids -- Analysis. ; Enantiomers -- Analysis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (176 pages)
    Edition: 1st ed.
    ISBN: 9781613243275
    Series Statement: D-Amino Acids: Practical Methods and Protocols
    DDC: 572/.65
    Language: English
    Note: Intro -- D-AMINO ACIDS: PRACTICAL METHODS AND PROTOCOLS -- CONTENTS -- PREFACE -- CHROMATOGRAPHIC DETERMINATION OF FREE D- AND L-AMINO ACIDS IN MARINE ALGAE -- 1. INTRODUCTION -- 2. MATERIALS AND METHODS -- Materials -- Instruments -- Reagents -- Methods -- Sources of Algae -- Sample Preparation -- Derivatization of Amino Acids -- HPLC Analysis -- Calculations -- Identification of D-Aspartate and D-Alanine Peaks -- 3. RESULTS AND DISCUSSION -- Chromatograms of Standard L- and D-Amino Acids and Sample Extract -- Applications -- REFERENCES -- DETERMINATION OF ACIDIC D-AMINO ACIDS AND THEIR N-METHYL DERIVATIVES IN BIVALVES AND OTHER MOLLUSKS -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Animals -- 2.2. Chemicals and Others -- 3. METHODS -- 3.1. Determination of Acidic D-Amino Acids Together with Neutral and Basic D-Amino Acids [4] -- 3.1.1. Preparation of Tissue Extracts -- 3.1.2. Derivatization -- 3.1.3. HPLC -- 3.2. Determination of Acidic N-Methyl D-Amino Acids [6,7,8] -- 3.2.1. Preparation of Tissue Extracts -- 3.2.2. Pretreatment and Derivatization -- 3.2.3. HPLC Analysis -- 4. RESULTS -- 4.1. Determination of D-Aspartate and D-Glutamate together with Neutral and Basic D-Amino Acids [4] -- 4.2. Determination of N-Methyl-D-Aspartate and N-Methyl-D-Glutamate [6,7,8] -- 5. NOTE -- REFERENCES -- PURIFICATION AND DETERMINATION OF N-METHYL-D-ASPARTIC ACID (NMDA) IN BIOLOGICAL TISSUES -- 1. INTRODUCTION -- 2. CHEMICALS AND REAGENTS -- 3. METHODS FOR THE PURIFICATION AND DETERMINATION OF NMDA -- 3.1. Purification -- 3.2. Determination of NMDA by HPLC -- 3.3. Thin-Layer Chromatography and Enzymatic Method for the Determination of NMDA -- 4. RESULTS -- 5. NOTES -- REFERENCES -- A SENSITIVE ONE STEP HPLC METHOD FOR SIMULTANEOUS DETERMINATION OF N-METHYL-(D AND L)-ASPARTATE, N-METHYL- (D AND L)-GLUTAMATE AND (D AND L)- ASPARTATE IN BIOLOGICAL TISSUES. , 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- ACKNOWLEDGMENTS -- REFERENCES -- METHODS FOR TOTAL DETERMINATION OF D-ASPARTIC ACID, D-GLUTAMIC ACID AND N-METHYL-D-ASPARTIC ACID AND FOR THE SPECIFIC DETERMINATION OF D-ASPARTIC ACID -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 3.1. Extraction and Purification of free Amino Acids from Biological Tissues -- 3.2. Colorimetric Method for total Determination of D-Asp, D-Glu and NMDA Based on the Measurement of the α-Ketoacids -- 3.3. Colorimetric Method for total Determination of D-Asp, D-Glu and NMDA based on the H2O2 Measurement -- 3.4. Fluorimetric Method for Determination of D-Asp, D-Glu and NMDA Based on the Oxidized Tyramine Measurement -- 3.5. Enzymatic-HPLC Method for the Specific Determination of D-Asp -- 4. RESULTS AND NOTES -- REFERENCES -- AN IMPROVED HPLC METHOD FOR DETERMINATION AND QUANTIFICATION OF D- AND L-ASPARTIC ACID -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- ACKNOWLEDGMENTS -- REFERENCES -- DETERMINATION OF FREE D-ASPARTATE AND D-SERINE IN RAT BRAIN AND PERIPHERY BY GAS CHROMATOGRAPHY AND HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Materials for GC -- 2.2. Materials for HPLC -- 3. METHODS -- 3.1. Animals and Tissue Preparation for GC and HPLC Analysis -- 3.2. Derivatization Procedure for GC -- 3.3. GC Conditions -- 3.4. Derivatization Procedure for HPLC -- 3.5. HPLC Conditions -- 4. CALCULATIONS -- 5. RESULTS -- 6. NOTES -- 6.1. Notes for GC -- 6.2. Notes for HPLC -- REFERENCES -- AN LC METHOD FOR THE ANALYSIS OF D-AMINO ACIDS -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- I. Separation -- One-Column System - Chiral Column for Separation of Single D- and L-Amino Acids -- Coupled-column - System for Separation of D- and L- Amino Acids as Constituents of a Mixture or a Protein. , II. Hydrolysis -- 4. RESULTS -- 5. NOTES -- REFERENCES -- SENSITIVE DETERMINATION OF D-AMINO ACIDS IN RAT BRAIN BY HPLC WITH A PIRKLE-TYPE CHIRAL COLUMN, FOLLOWING PRECOLUMN FLUORESCENCE DERIVATIZATION WITH NBD-F -- 1. INTRODUCTION -- 2. MATERIALS -- 2-1. D-Aspartate in the Pineal Gland -- 2-2. D-Serine in the Microdialysate from Rat Brain -- 3. METHODS -- 3-1. D-Aspartate in the Pineal Gland -- 3-2. D-Serine in the Microdialysate from Rat Brain -- 4. RESULTS -- 4-1. D-Aspartate in the Pineal Gland -- 4-2. D-Serine in the Microdialysate from Rat Brain -- 5. NOTES -- REFERENCES -- DETERMINATION OF SMALL AMOUNTS OF D-AMINO ACIDS IN MAMMALS USING COLUMN-SWITCHING HPLC -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Reagents and Equipment for Tissue Treatment -- 2.2. Reagents and Equipment for NBD Derivatization of Amino Acids -- 2.3. HPLC System -- 3. METHODS -- 3.1. Preparation of Tissue Samples -- 3.2. Fluorescence Derivatization of Amino Acids -- 3.3. HPLC Determination of Amino Acids -- 4. RESULTS -- 4.1. Determination of D-Ala in the Rat Tissues and Physiological Fluids [11] -- 4.2. Determination of D-Leu and D-Pro in the Brains of ddY/DAO+ Mice and ddY/DAO- Mice [12,13] -- 5. CONCLUSIONS -- 6. NOTES -- REFERENCES -- SENSITIVE DETERMINATION OF AMINO ACID ENANTIOMERS BY CE/LIF -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- METHODS OF DETECTION FOR AMINO ACID ENANTIOMERS IN THE VERTEBRATE RETINA -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- REFERENCES -- DETERMINATION OF NG-NITRO-ARGININE ENANTIOMERS IN RAT PLASMA BY CAPILLARY ELECTROCHROMATOGRAPHY WITH A CHIRAL MOBILE PHASE -- 1. INTRODUCTION -- 2. MATERIALS -- 3. METHODS -- 4. RESULTS -- 5. NOTES -- REFERENCES -- DETERMINATION OF D-ENANTIOMERS IN AMINO ACID MIXTURES AND PEPTIDES SUBJECTED TO SEQUENCING -- 1. INTRODUCTION -- 2. MATERIALS. , 3. METHODS -- 3.1. Quantitative Determination of Amino acid Chirality in Protein Hydrolysates -- 3.2. Determination of Amino acid Chirality During Subtractive Edman Degradation of Peptides -- 4. RESULTS -- 5. NOTES -- REFERENCES -- QUANTITATIVE DETERMINATION OF THE PROTEIN OF BACTERIAL ORIGIN BASED ON D-AMINO ACID CONTENTS -- 1. INTRODUCTION -- 2. MATERIAL AND METHOD -- 2.1. Methodology for the Animal Experiment -- 2.2. Preparation of Samples for Chemical Analysis -- 2.3. Chemical Analysis of Samples -- 3. RESULTS AND DISCUSSION -- 4. CONCLUSIONS -- REFERENCES -- METHODS FOR DETECTION OF D-AMINO ACIDS USING D-AMINO ACID OXIDASE -- 1. INTRODUCTION -- 2. MATERIALS -- 2.1. Materials for the Oxygen Consumption Assay -- 2.2. Materials for the Spectrophotometric Assays -- 2.3. Materials for the Biosensor -- 2.4. Materials for in vivo Determination of D-Serine -- 3. METHODS -- 3.1. Determination of Oxygen Consumption -- 3.2. Methods for the Spectrophotometric Assays -- 3.2.1. Determination of -Keto Acid Production: Direct Method -- 3.2.2. Determination of -Keto Acid Production: Indirect Method with DNP -- 3.2.3. Determination of Hydrogen Peroxide Production: Indirect Method with o-Dianisidine -- 3.2.4. Determination of Hydrogen Peroxide Production: Indirect Method with 4-Aminoantipyrine -- 3.2.5. Determination of Ammonia Production -- 3.3. Methods for the Biosensor -- 3.4. Determination of D-Serine Released from Astrocytes and C6 Glioma Cells -- 4. RESULTS -- 4.1. Oxygen Consumption Assay -- 4.2. Spectrophotometric Assays -- 4.3. RgDAAO Biosensor -- 4.4. Enzyme-linked Assay to Monitor D-Serine Release from Cultured Cells -- 5. NOTES -- 5.1. Oxygen Consumption Assay -- 5.2. Spectrophotometric Assays -- 5.3. RgDAAO Biosensor -- 5.4. Enzyme-linked Assay to Monitor D-Serine Release from Cultured Cells -- ACKNOWLEDGMENTS -- REFERENCES -- INDEX.
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  • 5
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The structure of the synthetic protected tripeptide methyl 1-{N-[N-(benzyloxycarbonyl)-α-aminoisobutyryl]-α-aminoisobutyryl}-4-hydroxypyrrolidine-2-carboxylate (Z–Aib–Aib–Hyp–OMe) ethanol solvate, C22H31N3O7.C2H6O, was determined by X-ray crystallography. The peptide backbone adopts a conformation, which lies in the right-handed helical region for Aib1, in the left-handed helical region for Aib2 and in the semi-extended region for Hyp3.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e578-e579 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The structure of the synthetic protected dipeptide (Z)-Pro–Leuol [systematic name: benzyl 2-(1-hydroxymethyl-3-methylbutylaminocarbonyl)pyrrolidine-1-carboxylate], C19H28N2O4, was determined by X-ray crystallography. The peptide adopts a novel backbone conformation compared with other longer oligopeptides containing Pro–Leuol.
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 5 (1993), S. 385-392 
    ISSN: 0899-0042
    Keywords: D-amino acids ; bacterial starter cultures ; amino acid racemases ; nutrition ; gas chromatography ; chiral stationary phases ; Chirasil-Val ; Lipodex ; cyclodextrins ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bacteria of the genera Acetobacter, Bifidobacterium, Brevibacterium, Lactobacillus, Micrococcus, Propionibacterium, and Streptococcus, which are used as so-called starter cultures for the large-scale production of fermented foods and beverages in food biotechnology, have been investigated for the chirality of their amino acids (AA) by gas chromatography (GC). Bacteria were grown in complex media, centrifuged, and washed with 0.85% aqueous NaCl. Aliquots were totally hydrolyzed (6 M HCl, 110°C, 18 h), or extracted with 70% aqueous ethanol in order to isolated free AA. The AA were adsorbed on Dowex WX 8 cation-exchanger, eluted with 4 M ammonia and converted into their N(O)-trifluoroacetyl(TFA) 2-propyl esters or TFA methyl esters. The AA derivatives were investigated by capillary GC using the chiral stationary phases Chirasil-L-Val, Chirasil-D-Val, and Lipodex E. Besides L-AA, in all bacteria D-amino acids (D-AA) were detected; those in the highest relative amounts were D-Ala and D-Asp (occurring in all bacteria) and, in several cases, D-Glu. Lower, but significant amounts of other D-AA such as D-Ser, D-Pro, D-Val, D-Thr, D-Ile, D-Leu, D-Met, D-Phe, D-Tyr, D-Orn, and D-Lys were also detected in certain bacteria. These findings explain the origin of D-AA found in all fermented foods and drinks produced with the aid of bacterial starter cultures. © 1993 Wiley-Liss, Inc.
    Additional Material: 3 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 23 (2000), S. 576-582 
    ISSN: 0935-6304
    Keywords: Gas chromatography-mass spectrometry ; amino acid enantiomers ; D-amino acids ; physiological fluids ; mammals ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ---Quantities of D-amino acids were determined in body fluids (urine, blood plasma and blood serum, milk) of mammals (hamster, horse, bovine, sheep, pig, and dog). Amino acids were isolated using a cation exchanger and converted into their N(O)-pentafluoropropionyl (or trifluoroacetyl) amino acid 2-propyl esters. Enantiomers were separated and quantified on a Chirasil-L-Val capillary column with mass spectrometric detection using selected ion monitoring. D-Enantiomers of most protein L-amino acids were detected. Largest absolute and relative amounts in most cases were determined for D-Ser and D-Ala in urine. Stereoisomers of 2,6-diaminopimelic acid were also measured in bovine, ovine, and porcine urine. Since D-amino acids were detected in all representative classes of the major orders of Mammalia, namely Artiodactyla, Perissodactyla, Rodentia, and Carnivora, and taking reports in the literature into account, it is postulated that D-amino acids occur in all mammals.
    Additional Material: 5 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 327 (1987), S. 32-32 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1997 (1997), S. 767-772 
    ISSN: 0947-3440
    Keywords: Peptide antibiotics ; Mycotoxins ; Peptaibols ; Peptaibiotics ; Sequence determination ; Mass spectrometry ; Non-proteinogenic amino acids ; α-Aminoisobutyric acid ; Isovaline ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: From a submerse culture of the fungus Hypocrea muroiana Hino et Katsumoto (Ascomycetes: Hypocreales) two major groups of peptides, designated hypomurocin (HM) A and B, belonging to the peptaibol family, could be characterized. Both groups showed antibiotic activity (Bacillus subtilis) and caused hemolysis of rat erythrocytes, HM A being less active than HM B. Peptides were isolated from the culture broth by chromatography on XAD-2 adsorber resin, octyl silica, and Sephadex LH 20. HM A and B were separated by preparative TLC, and individual peptides from each microheterogeneous group were isolated by preparative HPLC. Amino acid analysis and sequence determination by fast atom bombardment and electrospray tandem mass spectrometry revealed the composition and structures of six 11-mer peptides of the HM A group and of six 18-mer peptides of the HM B group. Positions of isomeric amino acids Leu/Ile and Val/Iva (present in some of the peptides) were determined by methanolytic cleavage of the pure peptides, followed by trifluoroacetylation of the dipeptide methyl esters released and assignment of their structures by gas chromatography-selected ion monitoring mass spectrometry. As examples, two sequences of HM A and HM B are presented (exchange positions in parentheses). - HM A-1(2): Ac-Aib1(D-Iva1)-Gln-Val-Val-Aib-Pro-Leu-Leu-Aib-Pro-Leuol11; HMB-1(2): Ac-Aib1-Ser-Ala-Leu-Aib-Gln-Aib-Val-Aib-Gly-Aib-Pro-Leu-Aib-Aib-Gln-Valol18 (Leuol18), (Ac = acetyl, Aib = α-aminoisobutyric acid, Iva = D-isovaline, Leuol = L-leucinol, Valol = L-valinol).
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