Abstract
Extracts from the nitrogen fixing blue-green algaAnabaena cylindrica catalyse a pyruvate decarboxylation, which is dependent on ferredoxin and stimulated by coenzyme A, ATP and a SH-protecting compound. This pyruvate clastic reaction is completely reversible: The net synthesis of pyruvate requires CO2, acetyl-coenzyme A and reduced ferredoxin. Preparations fromAnabaena cylindrica also catalyse the exchange reaction between CO2 and the carboxyl group of pyruvate. Thus the enzyme fromAnabaena cylindrica has essentially all the characteristics known for the pyruvate: ferredoxin oxidoreductase from anaerobic bacteria.
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