label: 2 methylcob(III)alamin-[methionine synthase] + 2 S-adenosyl-L-homocysteine + NADP(+) + H(+) <=> 2 cob(II)alamin-[methionine synthase] + 2 S-adenosyl-L-methionine + NADPH
label_lc: 2 methylcob(iii)alamin-[methionine synthase] + 2 s-adenosyl-l-homocysteine + nadp(+) + h(+) <=> 2 cob(ii)alamin-[methionine synthase] + 2 s-adenosyl-l-methionine + nadph