(2E,5Z)-tetradecadienoyl-CoA + reduced [electron-transfer flavoprotein] => (5Z)-tetradecenoyl-CoA + oxidized [electron-transfer flavoprotein] + H(+)
(2e,5z)-tetradecadienoyl-coa + reduced [electron-transfer flavoprotein] => (5z)-tetradecenoyl-coa + oxidized [electron-transfer flavoprotein] + h(+)