Methods The cell-free system was prepared by ultracentrifugation of Xenopus eggs and activated by cytochrome C.

方法超速离心制备非洲爪蟾卵无细胞体系,用细胞色素C激活为凋亡体系。

It is found in the enzyme cytochrome c oxidase, which is part of the respiratory electron-transport chain, and in the protein plastocyanin, which is involved in photosynthetic electron transport.

存在于细胞色素c氧化酶中，该酶是呼吸电子传递链上的一个部分。它还存在于质体蓝素蛋白中，和光合电子传递有关。