Impurity in a Common Growth Medium Component: Presence of an Isoflavonoid in Samples of l-Asparagine

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RESUMO

An impurity, present in some samples of l-asparagine, gave genistein on acid hydrolysis. The contaminant (probably the glucoside of genistein) was metabolized by Mycobacterium phlei to genistein and prunetin.

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