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Proposed corrinoid adenosylation pathway in S. enterica serovar Typhimurium LT2. Ado, 5′-deoxyadenosine; e−, electron; flavin(red), reduced forms of flavin nucleotides; PPPi, tripolyphosphate (postulated to be the by-product of the CobA reaction in S. enterica (M. V. Fonseca and J. C. Escalante-Semerana, unpublished results).
