1.14.19.1 ascorbate - 437644, 437653 1.14.19.1 cytochrome b5 - 437658, 437662, 695472, 695566, 699205, 700906, 701346, 734115, 744461, 744487, 745114, 745668, 745785, 746433, 746444, 746542 1.14.19.1 ferrocytochrome b5 - 684339, 684785, 685575, 685606, 686320, 687321, 687427, 687766, 688230, 688248, 688607, 688769, 689281, 689882, 726658, 727426 1.14.19.1 NADH - 437644, 437646, 437647, 437648, 437651, 437653, 437654, 437655, 437657, 437658, 437659, 437662, 437667, 437669, 437671, 658954, 695472, 695566, 695567, 696441, 696445, 696671, 696684, 696702, 697028, 697559, 697777, 697824, 698977, 701346, 701423 1.14.19.1 NADPH - 437644, 437660, 437663, 437670, 674215, 695472, 699205 1.14.19.1 cytochrome b5 a redox-active co-substrate reducing molecular oxygen to water. Ferrocytochrome b5 is regenerated by reduction of ferricytochrome b5 through cyt. b5 reductase using NADPH as electron donor 744416 1.14.19.1 NADPH absolute requirement, preferred 437651 1.14.19.1 heme b-type, nonheme iron-sulfur component 437651 1.14.19.1 cytochrome b5 dependent 437659 1.14.19.1 NADH dependent 437645