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  • 1
    Online-Ressource
    Online-Ressource
    Oxford :Oxford University Press, Incorporated,
    Schlagwort(e): Cell division. ; Electronic books.
    Beschreibung / Inhaltsverzeichnis: This volume focuses on the structural aspects of cell division - concentrating on both nuclear division (meiosis and mitosis) and cytoplasmic division (cytokinesis). Written as a companion volume to the earlier book in the series - Cell Cycle Control, this book provides an up-to-date account of developments in this exciting area of cell biology.
    Materialart: Online-Ressource
    Seiten: 1 online resource (343 pages)
    Ausgabe: 1st ed.
    ISBN: 9780191565779
    Serie: Frontiers in Molecular Biology Series ; v.20
    DDC: 571.844
    Sprache: Englisch
    Anmerkung: Intro -- Contents -- Plate section -- List of contributors -- Abbreviations -- 1. Cell cycle checkpoints: safe passage through mitosis -- 1. Introduction -- 2. Activation of the mitotic CDK controls entry into mitosis -- 2.1 Activation of mitotic CDK requires an association with cyclin -- 2.2 The APC mediates cyclin degradation and sister chromosome separation -- 2.3 Proteins that negatively regulate CDK activity -- 2.4 Post-translational phosphorylation regulates mitotic CDK activity -- 3. Cell cycle checkpoints -- 3.1 Mutational analysis identifies RAD9 as a DNA damage checkpoint -- 3.2 Checkpoints monitor many cellular events and involve signal transduction pathways that link delays in the cell cycle to repair processes -- 3.3 Ambiguities in the concept of cell cycle checkpoints -- 4. Lessons from budding yeast: the role of checkpoints in monitoring the completion of S phase and DNA damage -- 4.1 Synthetic lethal screens provide an efficient means of identifying additional checkpoint mutations -- 4.2 Detecting DNA damage -- 4.3 Monitoring completion of S phase -- 4.4 Signal transduction -- 4.5 p53 is a mammalian checkpoint gene that functions during G[sub(1)]-S and G[sub(2)]-M -- 4.6 The mammalian p53 gene is involved in a spindle assembly checkpoint -- 4.7 Arresting the cell cycle -- 4.8 Adaptation releases checkpoint-induced arrest -- 5. The role of checkpoints in monitoring spindle assembly -- 5.1 Genetic identification of the spindle assembly checkpoint -- 5.2 Spindle checkpoints monitor the state of the kinetochore -- 5.3 Tension is monitored by the spindle assembly checkpoint -- 5.4 Molecular changes at the kinetochore in response to tension -- 5.5 In some cells, free kinetochores rather than tension activate the spindle assembly checkpoint -- 5.6 The MAD and BUB genes are involved in different steps of the spindle assembly checkpoint. , 5.7 MAP kinase is required for the spindle assembly checkpoint in cell cycle extracts -- 5.8 The APC may be the target of the spindle assembly checkpoint -- 6. The role of checkpoints in the initial embryonic cell cycles -- 6.1 Relative timing of mitotic events may be the primary mechanism maintaining fidelity of division in early Xenopus embryos -- 6.2 Checkpoint control mechanisms are present but not activated in early Xenopus embryos -- 6.3 The syncytial Drosophila nuclear cycles exhibit a number of dependency relationships -- 6.4 A DNA replication/DNA damage checkpoint may operate during the late syncytial divisions of Drosophila -- 6.5 In the syncytial Drosophila embryo, checkpoints link delays in the cell cycle to nuclear elimination -- 7. Future directions -- References -- 2. Mitotic changes in the nuclear envelope -- 1. Overview -- 2. The nuclear lamina and membrane -- 2.1 Changes to the nuclear lamina at mitosis -- 2.2 Lamin-associated proteins -- 2.3 Regulation of nuclear membrane dynamics by phosphorylation -- 2.4 Disassembly of the lamina and nuclear membrane -- 3. Nuclear pore complexes -- 4. Reassembly of the nuclear envelope -- 5. Nuclear pore assembly -- 6. Future directions -- References -- 3. Poles apart? Spindle pole bodies and centrosomes differ in ultrastructure yet their function and regulation are conserved -- 1. Introduction -- 2. Ultrastructure of the spindle poles -- 2.1 The spindle pole bodies of fungi -- 2.2 Animal cell centrosomes -- 3. Components of polar MTOCs and their function -- 3.1 The gammasome -- 3.2 Units of self-assembly in the budding yeast SPB -- 3.3 Yeast SPB components identified through genetic screening -- 3.4 Components of the SPB in S. pombe -- 3.5 Components of animal cell centrosomes -- 4. Duplication cycles -- 4.1 SPB duplication and separation in S. cerevisiae. , 4.2 The centrosome cycle: maturation of the centriole -- 4.3 Co-ordination of the centrosome cycle with the cell cycle -- 4.4 Centrosome separation -- 5. Conclusions and perspectives -- Acknowledgements -- References -- 4. Microtubule dynamics, molecular motors, and chromosome behavior -- 1. Introduction -- 2. Microtubule dynamics during the cell cycle -- 2.1 Microtubule dynamics in vitro -- 2.2 Microtubule dynamics in vivo -- 2.3 Regulation of microtubule dynamics during the cell cycle -- 3. Chromosome movements during mitosis -- 3.1 Microtubule dynamics at kinetochores and chromosome movements -- 3.2 The role of chromosome arms in chromosome movements -- 4. Role of kinetochores and chromosome arms in spindle assembly -- 4.1 Role of kinetochores in spindle assembly -- 4.2 Role of chromosome arms in spindle assembly -- 4.3 Molecular basis of the effect of chromosome arms on spindle assembly -- 5. The importance of motor localizations in spindle assembly and function -- 5.1 Targeting by stereospecific interactions -- 5.2 Control of targeting by phosphorylation -- 6. Conclusion -- References -- 5. A moveable feast: the centromere-kinetochore complex in cell division -- 1. Introduction -- 2. Centromere structure -- 2.1 S. cerevisiae -- 2.2 S. pombe -- 2.3 Metazoan centromeres -- 2.4 Centromere proteins -- 2.5 Chromatin structure and the epigenetic centromere -- 3. Microtubule binding and motor function -- 3.1 A multitude of motors -- 3.2 Kinetochores and microtubule dynamics -- 3.3 What is the primary kinetochore-microtubule contact? -- 4. Chromatid cohesion -- 4.1 DNA topoisomerase II -- 4.2 Centromeric cohesion proteins -- 4.3 Proteolysis and chromatin cohesion -- 5. Regulatory properties of centromeres -- 5.1 Mechanoregulation by kinetochores -- 5.2 Kinetochore structure as a process -- 6. Conclusions and perspectives -- Acknowledgements. , References -- 6. Telomeres: structure, synthesis, and cell cycle regulation -- 1. Introduction -- 2. Telomerase -- 2.1 The RNA subunit of telomerase -- 2.2 Protein subunits of telomerase -- 2.3 Telomerase biochemistry -- 3. Coordination of telomere replication with semi-conservative DNA replication -- 3.1 The consequence of leading and lagging strand DNA synthesis for linear chromosomes -- 3.2 Is telomerase action coordinated with the primary replication machinery? -- 4. Telomeric chromatin and telomere-binding proteins -- 4.1 Proteins that bind double-stranded telomeric DNA -- 4.2 The yeast Rap1 protein recruits a silencing complex -- 4.3 Proteins that bind single-stranded telomeric DNA -- 4.4 Regulation of telomeric proteins -- 4.5 Other proteins that act at the telomere -- 5. Telomeres and telomerase regulation in mammals: the telomere hypotheses of cancer and aging -- 6. Alternative pathways for telomere maintenance -- 7. Future perspectives -- References -- 7. Meiosis: chromosome behavior and spindle dynamics -- 1. General features of meiosis -- 2. Chromosome pairing, synapsis, and movement -- 2.1 Homolog synapsis and disjunction -- 2.2 Non-recombinant chromosomes disjoin normally in meiosis I -- 2.3 Chromosome segregation in meiosis -- 3. Spindle assembly and dynamics -- 3.1 Meiotic spindle structure -- 3.2 Assembly of a bipolar meiotic spindle -- 3.3 Meiotic spindle dynamics -- 3.4 Cell cycle regulation of the meiotic divisions -- 4. Conclusions and future prospects -- Acknowledgements -- References -- 8. Inheritance of the cytoplasm during cell division -- 1. Introduction -- 2. Defining inheritance -- 3. Biogenesis -- 3.1 Clues from disassembly/reassembly of the Golgi apparatus -- 3.2 Growth and division of the Golgi stack -- 3.3 Templated growth: the budding yeast vacuole -- 4. Partitioning of the cytoplasm. , 4.1 Ultrastructural view of Golgi partitioning -- 4.2 Cell-free systems -- 4.3 Analysis of Golgi partitioning using green fluorescent protein -- 4.4 Semi-ordered partitioning -- 5. Conclusions and future directions -- References -- 9. Cytokinesis -- 1. Introduction -- 2. How do cells know where to place the cleavage furrow? -- 2.1 Cleavage site determination in animal cells -- 2.2 Division site determination in Schizosaccharomyces pombe -- 2.3 Division site determination in S. cerevisiae -- 2.4 Is a unified view of the control of contractile ring location possible? -- 3. How do cells know when to begin cleavage? -- 3.1 When is the signal transmitted? -- 3.2 Cytokinesis and cell cycle controls -- 4. What events link cytokinetic initiation signals with elaboration of the contractile ring? -- 4.1 Calcium in cytokinetic signal transduction -- 4.2 The role of Rho-family G proteins in cytokinesis -- 5. How is the contractile ring assembled and how does it function? -- 5.1 Actin at the cleavage furrow -- 5.2 The role of myosin in cytokinesis -- 5.3 The role of septins in cytokinesis -- 5.4 Other cytoskeletal proteins at the cleavage furrow -- 5.5 Processes related to cytokinesis -- 6. What do we still need to learn about cytokinesis? -- References -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- K -- L -- M -- N -- O -- P -- R -- S -- T -- U -- W -- X -- Z.
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  • 2
    Online-Ressource
    Online-Ressource
    New York, NY :Springer,
    Schlagwort(e): Molecular cloning. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (231 pages)
    Ausgabe: 1st ed.
    ISBN: 9781489932464
    Serie: Outline Studies in Biology Series
    DDC: 574.87/3282
    Sprache: Englisch
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  • 3
    Online-Ressource
    Online-Ressource
    New York : Cambridge University Press
    Schlagwort(e): Marine sciences Mathematical models ; Aquatic sciences Mathematical models ; Marine sciences ; Mathematical models.. ; Aquatic sciences ; Mathematical models ; Electronic books
    Beschreibung / Inhaltsverzeichnis: An advanced textbook on modeling, data analysis and numerical techniques for advanced students and researchers in chemical, biological, geological and physical oceanography.
    Materialart: Online-Ressource
    Seiten: 1 online resource (590 pages)
    ISBN: 9781139141406
    DDC: 551.46015118
    Sprache: Englisch
    Anmerkung: Description based on publisher supplied metadata and other sources , Cover; Title; Copyright; Dedication; Contents; Preface; 1 Resources, MATLAB primer, and introduction to linear algebra; 1.1 Resources; 1.2 Nomenclature; 1.3 A MATLAB primer; 1.4 Basic linear algebra; 1.5 Problems; 2 Measurement theory, probability distributions, error propagation and analysis; 2.1 Measurement theory; 2.1.1 Systems of measurements (scales); 2.1.2 Precision versus accuracy; 2.1.3 Systematic versus random errors; 2.1.4 Significant figures and roundoff; 2.1.5 Computational roundoff and truncation; 2.2 The normal distribution; 2.2.1 Parent versus sample distributions , 2.2.2 Mean/median/mode/moments2.2.3 The normal (Gaussian) distribution; 2.2.4 Testing a normal distribution; 2.2.5 Standardization and normalization (Z-scores); 2.2.6 Calculating normal probabilities; 2.3 Doing the unspeakable: throwing out data points?; 2.3.1 Chauvenet's criterion; 2.4 Error propagation; 2.4.1 The general equation; 2.4.2 Assumptions regarding independence or orthogonality; 2.5 Statistical tests and the hypothesis; 2.5.1 Hypothesis building and test; 2.5.2 Example 1: testing a null hypothesis; 2.5.3 Example 2: testing for a normal distribution; 2.6 Other distributions , 2.6.1 Student's t-distribution2.6.2 The F-distribution; 2.6.3 Poisson distribution; 2.6.4 Weibull distributions; 2.6.5 Log-normal transformations; 2.7 The central limit theorem; 2.8 Covariance and correlation; 2.8.1 Analysis of variance (ANOVA); 2.9 Basic non-parametric tests; 2.9.1 Spearman rank-order correlation coefficient; 2.9.2 Kendall's tau; 2.9.3 Wilcoxon signed-rank test; 2.9.4 Kruskal-Wallis ANOVA; 2.9.5 Mann-Whitney rank-sum test; 2.10 Problems; 3 Least squares and regression techniques, goodness of fit and tests, and nonlinear least squares techniques , 3.1 Statistical basis for regression3.1.1 The chi-squared (?2) defined (and goodness of fit); 3.1.2 Look at your residuals; 3.2 Least squares fitting a straight line; 3.2.1 Doing things the hard way (the normal equations); 3.2.2 Uncertainties in coefficients; 3.2.3 Uncertainties in an estimated y-value; 3.2.4 Example: ocean heat content; 3.2.5 Type II regressions (two dependent variables); 3.3 General linear least squares technique; 3.3.1 Choose your model functions wisely; 3.3.2 There is an easier way: the design matrix approach; 3.3.3 Solving the design matrix equation with SVD , 3.3.4 Multi-dimensional regressions3.3.5 Transformably linear models; 3.3.6 Non-coefficients; 3.4 Nonlinear least squares techniques; 3.4.1 Iterative techniques; 3.4.2 Uncertainties in nonlinear coefficients; 3.4.3 Example: Exponential phytoplankton growth; 3.4.4 Example: Gaussian on a constant background; 3.5 Problems; 4 Principal component and factor analysis; 4.1 Conceptual foundations; 4.1.1 The data matrix and the covariance matrix; 4.1.2 Standardization and normalization; 4.1.3 Linear independence and basis functions; 4.2 Splitting and lumping; 4.2.1 Discriminant analysis , 4.2.2 Cluster analysis
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  • 4
    Buch
    Buch
    Cambridge [u.a.] : Cambridge Univ. Press
    Schlagwort(e): Marine sciences Mathematical models ; Meereskunde ; Mathematische Modellierung
    Beschreibung / Inhaltsverzeichnis: This is a textbook on modelling, data analysis and numerical techniques for advanced students and researchers in chemical, biological, geological and physical oceanography
    Materialart: Buch
    Seiten: XV, 571 S. , graph. Darst., Kt. , 26 cm
    ISBN: 0521867835 , 9780521867832
    DDC: 551.46015118
    Sprache: Englisch
    Anmerkung: Formerly CIP Uk. - Includes bibliographical references and index
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  • 5
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] FIG. 1 Developmental northern blots showing the transcripts detected by cDNA clones of cyclins A (a) or B (b). Poly (A+) RNA from the following developmental stages was analysed: lane 1, 0-2 h embryos; lane 2, 2-4 h embryos; lane 3, first instar larvae; lane 4, second instar larvae; lane 5, third ...
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 290 (1981), S. 749-754 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The two types of Drosophila melanogaster rDNA insertion occur at different sites in the 28S gene, separated by 51 nucleotide pairs. A short segment of rDNA is deleted at the site of the 5 kilobase type I insertion, whereas there is no such deletion of rDNA sequences which flank the type II ...
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 355 (1992), S. 253-255 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] FIG. 1 Anatomy of the outer proliferative centre, and origins of S-phase LPCs. a, b, S-phase cells in the third instar larval CNS visualized by Bromouridine deoxyribose (BUdR) incorporation (shown in green). Propidium iodide-stained nuclei shown in grey tones. Confocal images showing ...
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 363 (1993), S. 637-640 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Measurements of kinase activity in relation to the mitotic cycle have not yet been described in Drosophila owing to lack of an efficient protocol for synchronizing cultured Drosophila cells and an inability to achieve synchronous development of popula-tions of embryos. But as the first 13 mitoses ...
    Materialart: Digitale Medien
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  • 9
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] One of the unanswered questions in mammalian development is how the embryonic–abembryonic axis of the blastocyst is first established. It is possible that the first cleavage division contributes to this process, because in most mouse embryos the progeny of one two-cell blastomere ...
    Materialart: Digitale Medien
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  • 10
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Hiiragi et al. compare our model of the developing mouse egg with theirs. They seem to present patterning as equivalent to determination, but this is confusing as patterning does not have to mean determination. We have never stated that mouse embryo development is determined. Mouse ...
    Materialart: Digitale Medien
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