CH3 C0Q是一个脂溶性 CH3O (CH2-CH=C—CH2)10-H Ubiquinone(Q) 可移动的电子/质子 (fully oxidized) CH3O CH3 载体 Fat soluble CH+e benzoquinone with a very long isoprenoid side CH3O R Semiquinone radical chain; can accept one or (QH) CHO CH3 two electrons, forming OH radical semiquinone or H+ ubiquinol (QH2); QH OH diffuses to the next CHO R Ubiquinol(QH2) complex(lil); the only CH3O CH3 (fully reduced) electron carrier not bound OH to a protein•Fat soluble benzoquinone with a very long isoprenoid side chain; can accept one or two electrons, forming radical semiquinone or ubiquinol (QH2 ); QH2 diffuses to the next complex (III); the only electron carrier not bound to a protein. CoQ是一个脂溶性 可移动的电子／质子 载体