(E)-4-coumarate + reduced [electron-transfer flavoprotein] => phloretate + oxidized [electron-transfer flavoprotein] + H(+)
(e)-4-coumarate + reduced [electron-transfer flavoprotein] => phloretate + oxidized [electron-transfer flavoprotein] + h(+)
(E)-4-coumarate + reduced [electron-transfer flavoprotein] => phloretate + oxidized [electron-transfer flavoprotein] + H(+)
(e)-4-coumarate + reduced [electron-transfer flavoprotein] => phloretate + oxidized [electron-transfer flavoprotein] + h(+)