label: S-methyl glutathione + cob(I)alamin-[alkylcobalamin reductase] + H(+) => apo-[alkylcobalamin reductase] + methylcob(III)alamin + glutathione
label_lc: s-methyl glutathione + cob(i)alamin-[alkylcobalamin reductase] + h(+) => apo-[alkylcobalamin reductase] + methylcob(iii)alamin + glutathione