Affiliation:
1. Department of Microbiology, University of Illinois, Urbana, Illinois 61801
Abstract
The distribution of tryptophanase was studied. The highest observed specific activity, μmoles per minute per milligram (dry weight) cells, is given in parentheses after each species. Tryptophanase was inducible and repressible in
Escherichia coli
(.914),
Paracolobactrum coliforme
(.210),
Proteus vulgaris
(.146),
Aeromonas liquefaciens
(.030),
Photobacterium harveyi
(.035),
Sphaerophorus varius
(.021),
Bacteroides
sp. (.048), and
Corynebacterium acnes
(.042). The enzyme was constitutive and nonrepressible in
Bacillus alvei
(.013), and was inducible but not repressible by glucose in
Micrococcus aerogenes
(.036). Indole-positive bacteria were found in fecal or intestinal samples from a variety of animals among the mammals, reptiles, insects, molluscs, fish, crustaceans, and amphibians.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
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