Oxygen dependence of redox state of copper in cytochrome oxidase in vitro.

@article{Hoshi1993OxygenDO,
  title={Oxygen dependence of redox state of copper in cytochrome oxidase in vitro.},
  author={Yoko Hoshi and O Hazeki and Mamoru Tamura},
  journal={Journal of applied physiology},
  year={1993},
  volume={74 4},
  pages={1622-7}
}
To obtain quantitative information about tissue oxygenation from near-infrared signals, the oxygen dependencies of the redox states of both heme a+a3 and copper in cytochrome oxidase of isolated mitochondria were determined at low oxygen concentrations (10(-6)-10(-9) M) using leghemoglobin as an oxygen indicator. The maximum absorbance changes caused by the aerobic-anaerobic transition measured at 830-760 nm of copper in state 3, state 4, and the uncoupled state were 10, 17, and 5% of those at… CONTINUE READING

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