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The Wood-Ljungdahl pathway of autotrophic CO and CO2 fixation. CODH, CO dehydrogenase; ACS, acetyl-CoA synthase; MeTr, methyltransferase; CFeSP, Corrinoid iron-sulfur protein; PFOR, pyruvate ferredoxin oxidoreductase. Letters (A,B) indicate two branches of the Wood-Ljungdahl pathway. Reactions leading to the formation of the methyl group of acetyl-CoA are colored red, while those leading to the carbonyl group are colored blue. Figure redrawn after reference (Ragsdale, 2004).
