ID 2.1.1.11 DE magnesium protoporphyrin IX methyltransferase. AN (-)-S-adenosyl-L-methionine:magnesium-protoporphyrin IX AN methyltransferase. AN magnesium-protoporphyrin O-methyltransferase. AN Mg-protoporphyrin IX methyltransferase. AN S-adenosyl-L-methionine:magnesium-protoporphyrin O-methyltransferase. AN S-adenosyl-L-methionine:Mg protoporphyrin methyltransferase. AN S-adenosylmethioninemagnesium protoporphyrin methyltransferase. AN S-adenosylmethionine-magnesium protoporphyrin methyltransferase. CA Mg-protoporphyrin IX + S-adenosyl-L-methionine = Mg-protoporphyrin IX CA 13-monomethyl ester + S-adenosyl-L-homocysteine. DR P26236, BCHM_RHOCA ; Q9SW18, CHLM_ARATH ; Q55467, CHLM_SYNY3 ; //