2.1.1.291 (R,S)-Reticuline 7-O-methyltransferase and (R,S)-norcoclaurine 6-O-methyltransferase of Papaver somniferum - cDNA cloning and characterization of methyl transfer enzymes of alkaloid biosynthesis in opium poppy Papaver somniferum 2.1.1.291 The roles of latex and the vascular bundle in morphine biosynthesis in the opium poppy, Papaver somniferum Papaver somniferum