ID 2.1.1.352 DE 3-O-acetyl-4'-O-demethylpapaveroxine 4'-O-methyltransferase. CA (S)-S-adenosyl-L-methionine + 3-O-acetyl-4'-O-demethylpapaveroxine = 3-O- CA acetylpapaveroxine + H(+) + S-adenosyl-L-homocysteine. CC -!- This activity is part of the noscapine biosynthesis pathway, CC as characterized in the plant Papaver somniferum (opium poppy). CC -!- It is catalyzed by heterodimeric complexes of the OMT2 gene product CC and the product of either OMT3 or 6OMT. CC -!- OMT2 is the catalytic subunit in both complexes. DR I3PLQ6, SOMT2_PAPSO; //