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