label: (2R)-2-methylbutanoyl-CoA + oxidized [electron-transfer flavoprotein] + H(+) <=> ethylacryloyl-CoA + reduced [electron-transfer flavoprotein]
label_lc: (2r)-2-methylbutanoyl-coa + oxidized [electron-transfer flavoprotein] + h(+) <=> ethylacryloyl-coa + reduced [electron-transfer flavoprotein]