[Cysteine effects on yeast growth].
The effect of cysteine on yeasts with different requirements for exogenous pantothenic acid was studied during their cultivation in the synthetic nutrient medium. Cysteine added at a concentration of 4X10(-4) M and 6X10(-4) M inhibited the growth of Saccharomyces cerevisiae of the Krasnodarsk race and Candida utilis BKM y-74 to a great extent and that of Saccharomycodes ludwigii BKM y-1176 to a lesser extent. The inhibitory effect of cystein was reversed by pantothenic acid, beta-alanine, aspartate and aspartic acid. It is assumed that cysteine inhibits metabolic utilization of pantothenic acid.
D000409:Alanine / Q000494:pharmacology; D001224:Aspartic Acid / Q000494:pharmacology; D002175:Candida / Q000187:drug effects / Q000254:growth & development*; D003545:Cysteine / Q000494:pharmacology*; D010205:Pantothenic Acid / Q000378:metabolism; D012440:Saccharomyces / Q000187:drug effects / Q000254:growth & development*; D013045:Species Specificity
D010205:Pantothenic Acid; D001224:Aspartic Acid; D003545:Cysteine; D000409:Alanine
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