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Prebiotic transamination.

Biological amino acids and alpha keto acids directly condense with decarboxylation and transamination to yield product amino acids. This process is closely related to unusual amino acid decarboxylase enzymes in certain microorganisms and may represent a primordial mode of amino acid metabolism.

Alanine↗

Elevation of blood keto acids in cerebrocortical necrosis.

Values of various alpha-keto acids in whole blood were determined from cases of cerebrocortical necrosis (CCN), a thiamine deficiency disease, and were compared with those from normal animals. Thiamine pyrophosphate is an essential cofactor in the decarboxylation of many alpha-keto acids and this was reflected in elevated values not only of pyruvic acid but of glyoxylic, alpha-keto glutaric, phenyl pyruvic and hydroxyphenyl pyruvic acids in the CCN cases.

Animals↗