label: (2E)-butenoyl-CoA + reduced [electron-transfer flavoprotein] + CO2 => glutaryl-CoA + oxidized [electron-transfer flavoprotein] + 2 H(+)
label_lc: (2e)-butenoyl-coa + reduced [electron-transfer flavoprotein] + co2 => glutaryl-coa + oxidized [electron-transfer flavoprotein] + 2 h(+)