(13Z,16Z,19Z,22Z)-octacosatetraenoyl-CoA + NADP(+) => (2E,13Z,16Z,19Z,22Z)-octacosapentaenoyl-CoA + NADPH + H(+)
(13z,16z,19z,22z)-octacosatetraenoyl-coa + nadp(+) => (2e,13z,16z,19z,22z)-octacosapentaenoyl-coa + nadph + h(+)