Abstract
Several aspects of amino acid metabolism were studied in the fruiting myxobacterium Myxococcus xanthus. Alanine and aspartate aminotransferases were detected at significant levels in vegetative cells and myxospores. In contrast, glutamate dehydrogenase, alanine dehydrogenase and aspartase were not detectable in the same preparations, which is consistent with the fact that inorganic nitrogen is not required for growth. The data presented suggest that the aminotransferases demonstrated provide for the synthesis of nonessential amino acids and concomitantly, oxidizable substrates.
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