label: (1H-pyrrole-2-carbonyl)-[peptidyl-carrier protein] + 2 reduced [electron-transfer flavoprotein] => L-prolyl-[peptidyl-carrier protein] + 2 oxidized [electron-transfer flavoprotein] + H(+)
label_lc: (1h-pyrrole-2-carbonyl)-[peptidyl-carrier protein] + 2 reduced [electron-transfer flavoprotein] => l-prolyl-[peptidyl-carrier protein] + 2 oxidized [electron-transfer flavoprotein] + h(+)