Abstract
Summary
A fatty acid which promoted growth of L. casei 280–16A was isolated from saponified butterfat and identified as myristic acid together with traces of an unidentified contaminant. The contaminant was apparently necessary to potentiate the growth promoting activity of myristic acid since purified commercial myristic acid (recrystallized) was essentially inactive. Activity of the latter could be potentiated by traces of α-hydroxymyristic acid, but this substance did not appear to be present in the isolated material.
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