SELECTION OF MUTANTS OF ESCHERICHIA COLI CONSTITUTIVE FOR TRYPTOPHANASE
نویسندگان
چکیده
منابع مشابه
Selection of mutants of Escherichia coli constitutive for tryptophanase.
Proc. Natl. Acad. Sci. U.S. 40:1064, 1954). The galactose mutations are of the same stability as the streptomycin-sensitivity gene. Some 60 other galactose mutants are similar to those reported in Table 1. No instances of mutability grossly higher than Gal16 or Galg have been noted, and no certain cases of failure to revert have been found. Combinations of Gal mutations have been synthesized vi...
متن کاملIsolation of Mutants Affecting Tryptophanase Production in Escherichia Coli.
Gartner, Theodore K. (University of California, Davis), and Monica Riley. Isolation of mutants affecting tryptophanase production in Escherichia coli. J. Bacteriol. 89:313-318. 1965.-Mutants of Escherichia coli K-12 were isolated which appear to have suffered an alteration in the regulation system governing tryptophanase synthesis. A novel selection method was used to isolate tryptophanase muta...
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The bacterial SOS regulon is strongly induced in response to DNA damage from exogenous agents such as UV radiation and nalidixic acid. However, certain mutants with defects in DNA replication, recombination, or repair exhibit a partially constitutive SOS response. These mutants presumably suffer frequent replication fork failure, or perhaps they have difficulty rescuing forks that failed due to...
متن کاملRepression of Tryptophanase Synthesis in Escherichia Coli.
Beggs, William H. (University of Cincinnati, Cincinnati, Ohio), and Herman C. Lichstein. Repression of tryptophanase synthesis in Escherichia coli. J. Bacteriol. 89:996-1004. 1965.-The nature of the glucose effect on tryptophanase in Escherichia coli (Crookes) was investigated to test the catabolite-repression hypothesis. Under static conditions of growth in the presence of 0.005 m glucose, try...
متن کاملEscherichia coli tryptophanase in the enteric environment.
The activity of the enzyme tryptophanase in the enteric environment was investigated to elucidate the significance of the enzyme in the metabolism of Escherichia coli. The tryptophanase activity, tryptophan content, and indole concentration as well as the numbers of E. coli were determined in the intestinal and fecal contents of conventional, germ-free, and monocontaminated axenic laboratory mi...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1963
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.85.1.245-246.1963