2 cob(II)alamin-[cyanocobalamin reductase] + 2 hydrogen cyanide + NADP(+) => 2 cyanocob(III)alamin + 2 apo-[cyanocobalamin reductase] + NADPH + H(+)
2 cob(ii)alamin-[cyanocobalamin reductase] + 2 hydrogen cyanide + nadp(+) => 2 cyanocob(iii)alamin + 2 apo-[cyanocobalamin reductase] + nadph + h(+)