细胞色素c氧化酶中电子进入的动力学。
The kinetics of electron entry in cytochrome c oxidase.
作者信息
Malatesta F, Antonini G, Sarti P, Vallone B, Brunori M
机构信息
Dipartimento di Medicina Sperimentale e Scienze Biochimiche, Universitá di Roma Tor Vergata, Italy.
出版信息
Biol Met. 1990;3(2):118-21. doi: 10.1007/BF01179517.
The kinetics of electron entry in beef heart cytochrome c oxidase have been studied by stopped-flow spectroscopy following chemical modification of the CuA site with mercurials. In this derivative CuA is no longer reducible by cytochrome c while cytochrome alpha may accept electrons from the latter with rates comparable to the native enzyme. The results indicate that CuA is not the exclusive electron entry site in cytochrome c oxidase.
在用汞化合物对CuA位点进行化学修饰后，通过停流光谱法研究了电子进入牛心细胞色素c氧化酶的动力学。在这种衍生物中，细胞色素c不再能使CuA还原，而细胞色素α可以从细胞色素c接受电子，其速率与天然酶相当。结果表明，CuA不是细胞色素c氧化酶中唯一的电子进入位点。
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