Clostridium sporogenes has been found to require L-leucine and L-valine for growth in a minimal medium, although valine can be replaced by isobutyrate and leucine by isovalerate. Cells grown in minimal media incorporated significant 14C from [14C]valine into leucine and from [14C]leucine into valine. Growth with [4,5-3H]leucine also resulted in the incorporation of 3H into valine. These results indicate that these bacteria can interconvert leucine and valine.
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Monticello et al. (1982) studied this question.
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