ID 1.5.1.27 DE 1,2-dehydroreticulinium reductase (NADPH). AN 1,2-dehydroreticulinium ion reductase. CA (R)-reticuline + NADP(+) = 1,2-dehydroreticuline + H(+) + NADPH. CC -!- Reduces the 1,2-dehydroreticulinium ion to (R)-reticuline, which is a CC direct precursor of morphinan alkaloids in the poppy plant. CC -!- The enzyme does not catalyze the reverse reaction to any significant CC extent under physiological conditions. DR P0DKI7, STORR_PAPSO; //