ID 1.3.1.54 DE precorrin-6A reductase. AN precorrin-6X reductase. AN precorrin-6Y:NADP(+) oxidoreductase. CA NADP(+) + precorrin-6B = 2 H(+) + NADPH + precorrin-6A. CC -!- The enzyme, which participates in the aerobic (late cobalt insertion) CC pathway of adenosylcobalamin biosynthesis, catalyzes the reduction of CC the double bond between C-18 and C-19 of precorrin-6A. CC -!- See EC 1.3.1.106 for the corresponding enzyme that participates in CC the anaerobic cobalamin biosynthesis pathway. DR P9WP88, COBK_MYCTO ; P9WP89, COBK_MYCTU ; O68098, COBK_RHOCB ; DR Q53139, COBK_RHOER ; P21920, COBK_SINSX ; //