ID 1.1.1.415 DE noscapine synthase. CA NAD(+) + narcotine hemiacetal = H(+) + NADH + noscapine. CC -!- The enzyme, characterized from the plant Papaver somniferum (opium CC poppy), catalyzes the last step in the biosynthesis of the CC isoquinoline alkaloid noscapine. DR I3PLR3, SDR1_PAPSO ; //