E. P. Abraham, G. G. F. Newton (auth.), David Gottlieb, Paul's Biosynthesis PDF

By E. P. Abraham, G. G. F. Newton (auth.), David Gottlieb, Paul D. Shaw (eds.)

ISBN-10: 3662376504

ISBN-13: 9783662376508

ISBN-10: 3662384418

ISBN-13: 9783662384411

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W. ROBBINS, and H. E. CARTER: The biosynthesis of chloramphenicol. II. Acetylation of p-nitrophenylserinol. J. Bacteriol. 72, 153 (1956). GWATKIN, R. , and D. GOTTLIEB: Mutants recovered after exposure of streptomyces venezuelae to X-rays. J. Bacteriol. 71, 328 (1956). , and D. GOTTLIEB: The dynamics of chloramphenicol synthesis. Antibiotics & Chemotherapy 3, 809 (1953). McLEAN, I. , J. L. SCHWAB, A. B. HILLEGAS, and A. S. SCHLINGMAN: Susceptibility of microorganisms to chloramphenicol (chloromycetin).

The amount of antibiotic that can be 20 40 60 80 100 HOURS synthesized in a specific medium, by a Fig. 4. The effect of the addition of chloramphenicol at various time intervals strain of S. venezuelae, seems fixed and during the growth of S. venezuelae on the probably is regulated by a feedback subsequent production of the antibiotic mechanism (LEGATOR and GOTTLIEB, 1953). A strain which under certain conditions produced 60 fLg/ml of medium was limited to this total concentration by the amount already in the culture.

CH -CH a I fN:CCH 2-CH/ ~ A' I N I 0 CH 2 t OH CH a CHa CHs (a) (b) Fig. 1. Aspergillic acid The chemical nomenclature of aspergillic acid is simpler if it is described as the N-oxide (Fig. 1 b), 3-isobutyl-6-sec-butyl-2-hydroxypyrazine-1-oxide, and its structure is sometimes given as in Fig. 1 b. DUTCHER (1947a) showed that aspergillic acid behaved like a hydroxamic acid and that the ultra-violet spectrum of aspergillic acid was similar to that of 2-hydroxypyrazine (oc-pyrazinone) which is known to exist mainly as the pyrazinone form in aqueous solution (CHEESEMAN, 1960).

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Biosynthesis by E. P. Abraham, G. G. F. Newton (auth.), David Gottlieb, Paul D. Shaw (eds.)

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