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[Effect of the carbon/nitrogen ratio on the antibiotic activity of prodigiosin].

The antibacterical activity of prodigiosin varies according to the C/N ratio in the cultural media for S. marcescens. In organic media, as nutrient agar, peptone or soytone, the optimal ratio lies between 4 and 5, and higher values are required for "mineral media" where the nitrogen source is essentially an ammonium salt. The separate C source would be probably used as "acetate source" for the synthesis of the terminal alkylpyrrole.

Carbon↗
PubMed1976

Prodiginine (prodigiosin-like) pigments from Streptomyces and other aerobic Actinomycetes.

About 95 microorganisms, mainly streptomycetes, were examined for prodiginine pigments. The test methods, including some media for stimulating pigment production, are given. All nine strains which produced prodiginine pigments were characterized and the pigments identified. The results were used to propose structures for five prodigiosin-like pigments from actinomycetes reported in the literature between 1947 and 1964. Streptoverticillium sp. 26-1 furnished good yields of butylcycloheptylprodiginine (I), whose antimicrobial activity is given.

Actinomycetales↗