Studies on rumen metabolism. V.—formation of branched long chain fatty acids in cultures of rumen bacteria

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Abstract
When mixed rumen bacteria were incubated with isobutyrate‐1‐14C, the 14C‐label was incorporated into branched long chain fatty acids with both odd and even numbers of carbon atoms.Tracer studies showed that the 14C‐label from DL‐valine‐4‐14C was incorporated into branched long chain fatty acids and also into straight chain fatty acids with odd numbers of carbon atoms. In addition, labelled isobutyrate and propionate were synthesised from valine and probably represent intermediates in the synthesis of the branched and straight chain fatty acids respectively.

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