1887

Abstract

SUMMARY: The growth-promoting action of -alanine on and two strains of is stimulated or inhibited to different extents by the optical enantiomorphs of methionine, glutamic acid, asparagine and -alanine. This behaviour can be considered as due, in each individual case, to one or more of three separate effects: () stimulatory, () inhibitory, and () antagonistic. In general, the -forms of the amino-acids have a more pronounced action than the -isomers. Racemic mixtures have intermediate effects. Similar but less striking results are observed when -alanine is replaced by pantothenic acid. Atypical effects are obtained with -alanine and -glutamic acid.

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/content/journal/micro/10.1099/00221287-5-4-648
1951-12-01
2021-10-24
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