label: L-arginyl-[methyl-coenzyme M reductase] + AH2 + 2 S-adenosyl-L-methionine <=> (5S)-C-methyl-L-arginyl-[methyl-coenzyme M reductase] + 5'-deoxyadenosine + L-methionine + A + S-adenosyl-L-homocysteine + 2 H(+)
label_lc: l-arginyl-[methyl-coenzyme m reductase] + ah2 + 2 s-adenosyl-l-methionine <=> (5s)-c-methyl-l-arginyl-[methyl-coenzyme m reductase] + 5'-deoxyadenosine + l-methionine + a + s-adenosyl-l-homocysteine + 2 h(+)