label: Co(I)-[corrinoid Fe-S protein] + (6S)-5-methyl-5,6,7,8-tetrahydrofolate + H(+) => methyl-Co(III)-[corrinoid Fe-S protein] + (6S)-5,6,7,8-tetrahydrofolate
label_lc: co(i)-[corrinoid fe-s protein] + (6s)-5-methyl-5,6,7,8-tetrahydrofolate + h(+) => methyl-co(iii)-[corrinoid fe-s protein] + (6s)-5,6,7,8-tetrahydrofolate