Studies on the Mutation of Streptomycin Dependent, Especially on the Fulctuation of Streptomycin Dependent when Escherichia coli is Continually Cultured on Streptomycin Agar
نویسندگان
چکیده
منابع مشابه
Effects of streptomycin deprivation on enzyme synthesis in streptomycin-dependent Escherichia coli.
During growth of streptomycin-dependent strains of Escherichia coli in the absence of streptomycin (deprived growth), both constitutive and inducible synthesis of beta-galactosidase were preferentially inhibited. A similar preferential inhibition of constitutive and derepressed synthesis of alkaline phosphatase was observed. Catabolite repression accounted for part, but not all, of the inhibiti...
متن کاملCounter-current distribution studies on streptomycin; the tautomerism of streptomycin.
The simplicity and reproducibility which characterize the conversion of streptomycin to malt01 (1) by heating in dilute alkali have made this reaction the basis of a frequently used analytical method for streptomycin (2). When used in these laboratories as a method of assaying streptomycin preparations, however, the malt01 reaction consistently gave lower yields per unit of potency with pure st...
متن کاملThe Effect of Sub-Inhibitory Streptomycin on Capsular Polysaccharide Production and Streptomycin Resistance in Escherichia coli
Previous studies have shown that pre-treatment of Escherichia coli B23 with subinhibitory concentrations of aminoglycosides leads to a subsequent increase in the level of capsular polysaccharide, as well as an increased resistance to streptomycin. Using capsular polysaccharide synthesis pathway mutants, we investigated the correlation between the level of capsular polysaccharide and streptomyci...
متن کاملRegulation of acetohydroxy acid synthase in streptomycin-dependent Escherichia coli.
Growth of streptomycin-dependent mutants of Escherichia coli K-12 was insensitive to valine when dihydrostreptomycin was present in a nonlimiting concentration in glucose-salts medium. Acetohydroxy acid synthase was derepressed under these conditions, owing to relaxation of catabolite repression. Valine sensitivity and catabolite repression were restored when streptomycin-dependent E. coli K-12...
متن کاملSTUDIES ON STREPTOMYCIN VI. : The Effect of Streptomycin on the Metabolism of Multiplying Bacteria.
In a previous study the authors (Henry et al., 1948) reported on some of the effects of streptomycin (SM) on the metabolism of resting cells of Staphylococcus aureus, BaciUus cereus, and Shigella sonnei. It was found that SM inhibited the oxidation of certain carbohydrates and carbohydrate intermediates by susceptible strains of these organisms, but had no inhibitory effect on resistant strains...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nippon Saikingaku Zasshi
سال: 1959
ISSN: 1882-4110,0021-4930
DOI: 10.3412/jsb.14.58