The Wood Ljungdahl pathway comprises two branches: the Eastern, or methyl, branch that allows the conversion of CO2 to methyltetrahydrofolate and the Western, or carbonyl, branch that allows {HEAD ~ the conversion} of methyl THF, CO, and {TAIL ~ Coenzyme A} into acetyl CoA  
The Wood Ljungdahl pathway comprises two branches : the Eastern , or methyl , branch that allows the conversion of CO2 to methyltetrahydrofolate and the Western , or carbonyl , branch that allows { HEAD ~ the conversion } of methyl THF , CO , and { TAIL ~ Coenzyme A } into acetyl CoA
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