(2E,9E)-octadecadienoyl-CoA + reduced [electron-transfer flavoprotein] => (9E)-octadecenoyl-CoA + oxidized [electron-transfer flavoprotein] + H(+)
(2e,9e)-octadecadienoyl-coa + reduced [electron-transfer flavoprotein] => (9e)-octadecenoyl-coa + oxidized [electron-transfer flavoprotein] + h(+)