label: L-isoleucyl-[protein] + AH2 + 2 S-adenosyl-L-methionine => methylcyclopropylglycine-[protein] + 2 5'-deoxyadenosine + 2 L-methionine + A + 2 H(+)
label_lc: l-isoleucyl-[protein] + ah2 + 2 s-adenosyl-l-methionine => methylcyclopropylglycine-[protein] + 2 5'-deoxyadenosine + 2 l-methionine + a + 2 h(+)