label: Mg-protoporphyrin IX 13-monomethyl ester + S-adenosyl-L-methionine + H2O = Mg-13(1)-hydroxyprotoporphyrin 13-monomethyl ester + 5'-deoxyadenosine + L-methionine + H(+)
label_lc: mg-protoporphyrin ix 13-monomethyl ester + s-adenosyl-l-methionine + h2o = mg-13(1)-hydroxyprotoporphyrin 13-monomethyl ester + 5'-deoxyadenosine + l-methionine + h(+)