(2E)-2-propylpent-2-enoyl-CoA + reduced [electron-transfer flavoprotein] => valproyl-CoA + oxidized [electron-transfer flavoprotein] + H(+)
(2e)-2-propylpent-2-enoyl-coa + reduced [electron-transfer flavoprotein] => valproyl-coa + oxidized [electron-transfer flavoprotein] + h(+)
(2E)-2-propylpent-2-enoyl-CoA + reduced [electron-transfer flavoprotein] => valproyl-CoA + oxidized [electron-transfer flavoprotein] + H(+)
(2e)-2-propylpent-2-enoyl-coa + reduced [electron-transfer flavoprotein] => valproyl-coa + oxidized [electron-transfer flavoprotein] + h(+)