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