S-Adenosylmethionine decarboxylase has been purified to homogeneity (26,000-fold) from rat liver. The enzyme has a molecular weight of 155,000 and a subunit molecular weight of 42,000. One mole of covalently bound pyruvate was found to be present per mole of enzyme subunit. This is the first mammalian enzyme found to contain covalently linked pyruvate.
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Demetriou et al. (1978) studied this question.
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