preferred_name: a ubiquinone + reduced [electron-transfer flavoprotein] <=> a ubiquinol + oxidized [electron-transfer flavoprotein] + H(+)
preferred_name_lc: a ubiquinone + reduced [electron-transfer flavoprotein] <=> a ubiquinol + oxidized [electron-transfer flavoprotein] + h(+)
label: a ubiquinone + reduced [electron-transfer flavoprotein] <=> a ubiquinol + oxidized [electron-transfer flavoprotein] + H(+)
label_lc: a ubiquinone + reduced [electron-transfer flavoprotein] <=> a ubiquinol + oxidized [electron-transfer flavoprotein] + h(+)