EFFECT OF d -AMINO ACIDS ON GROWTH OF LACTOBACILLI

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Abstract
Some D-amino acids, when present in relatively high concn., repress growth of various lactobacilli. In some cases, the L-forms of these amino acids cause a similar, but more moderate, repression, indicating that these D-amino acids do not act as antimetabolites for the L- forms. The effect is not permanent as shown by the fact that repressions are obtained only when the incubation period is relatively short. This suggests a possible conversion of the D- to the L- form before utilization.