Abstract

Abstract Extracts of acetate-grown Methanosarcina barkeri strain Fusaro formed methane from acetate plus ATP and form acetyl phosphate under H 2 . Coenzyme A (CoA) is stimulatory. Inhibitors of methanogenesis are cyanide, propyliodide and bromoethanesulfonic acid. In cofactor-free extracts methanogenic activity from acetate was restored by addition of ATP, CoA, coenzyme M and 7-mercaptoheptanoylthreonine phosphate. An enzyme-bound corrinoid was found to be involved in methanogenesis from acetate.

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