2-methylpropenoyl-CoA + reduced [electron-transfer flavoprotein] => 2-methylpropanoyl-CoA + oxidized [electron-transfer flavoprotein] + H(+)
2-methylpropenoyl-coa + reduced [electron-transfer flavoprotein] => 2-methylpropanoyl-coa + oxidized [electron-transfer flavoprotein] + h(+)
2-methylpropenoyl-CoA + reduced [electron-transfer flavoprotein] => 2-methylpropanoyl-CoA + oxidized [electron-transfer flavoprotein] + H(+)
2-methylpropenoyl-coa + reduced [electron-transfer flavoprotein] => 2-methylpropanoyl-coa + oxidized [electron-transfer flavoprotein] + h(+)