N(delta)-methyl-L-arginine + 2 Fe(III)-[cytochrome b5] + H2O => N(omega)-hydroxy-N(delta)-methyl-L-arginine + 2 Fe(II)-[cytochrome b5] + 2 H(+)
n(delta)-methyl-l-arginine + 2 fe(iii)-[cytochrome b5] + h2o => n(omega)-hydroxy-n(delta)-methyl-l-arginine + 2 fe(ii)-[cytochrome b5] + 2 h(+)
N(delta)-methyl-L-arginine + 2 Fe(III)-[cytochrome b5] + H2O => N(omega)-hydroxy-N(delta)-methyl-L-arginine + 2 Fe(II)-[cytochrome b5] + 2 H(+)
n(delta)-methyl-l-arginine + 2 fe(iii)-[cytochrome b5] + h2o => n(omega)-hydroxy-n(delta)-methyl-l-arginine + 2 fe(ii)-[cytochrome b5] + 2 h(+)