label: 4-(trimethylamino)butanoyl-CoA + oxidized [electron-transfer flavoprotein] + H(+) <=> crotonobetainyl-CoA + reduced [electron-transfer flavoprotein]
label_lc: 4-(trimethylamino)butanoyl-coa + oxidized [electron-transfer flavoprotein] + h(+) <=> crotonobetainyl-coa + reduced [electron-transfer flavoprotein]