ISSN:
1745-4514
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
A 38.5 kDa alkaline protease from pyloric caeca of tambaqui (Colossoma macropomumj, a tropical freshwater fish, was partially purified in three steps: thermal treatment (45Cfor 30 min), salting-out (ammonium sulfate at 40–80% of saturation) and gel filtration (Sephadex G-75), The purification and yield were 51.2-fold and 40%, respectively. The effects of pH, temperature, inhibitors, and substrates on proteolytic activities of partially purified enzyme were investigated. The optimum pH was 9.5, while the optimum temperature was 60C. This alkaline proteolytic activity remained unaltered after 30 min incubation at 55C. Active site inhibition provided additional evidence that this activity is attributed to a trypsin-like enzyme.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1745-4514.2001.tb00734.x
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