标题：Electron Carriers of Cytochrome Oxidase Detectable by Electron Paramagnetic Resonance and Their Relationship to Those Traditionally Recognized in This Enzyme
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1973
卷号：70
期号：9
页码：2477-2481
DOI：10.1073/pnas.70.9.2477
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：On the basis of oxidoreductive rapid kinetic and titration experiments with purified cytochrome c oxidase (EC 1.9.3.1 ), monitored by electron paramagnetic resonance (EPR) at 13{degrees}K and by spectrophotometry at 100{degrees}K, a new assignment of EPR signals is proposed. The bulk of both the low-spin (g = 3.0; 2.2; 1.5) and highspin (g = 6; 2) signals is attributed to the component with the properties of traditional cytochrome a. It is further proposed that the absorption band at 655 nm represents the most unambiguous manifestation of the a3 component.
关键词：cytochrome a , a 3 ; low-temperature spectra ; rapid kinetics ; redox titrations
