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Detection of a near infra-red absorption band of ferrohaem a3 in cytochrome c oxidase.

Rich, PR; Moody, AJ; Ingledew, WJ; (1992) Detection of a near infra-red absorption band of ferrohaem a3 in cytochrome c oxidase. FEBS Lett , 305 (3) pp. 171-173.

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Abstract

We have detected weak absorption bands in the near infra-red region of reduced mammalian cytochrome c oxidase, analogous to those that we have recently reported to be present in the bacterial cytochrome o (Ingledew, W.J., Bacon, M. and Rich, P.R. (1992) FEBS Lett. 305, 167-170). The major band is centred at 784 nm and has an sigma mM-1.cm-1 of around 0.1. It is shifted to 760 nm in the carbon monoxide compound and is absent in the reduced cyanide complex. We attribute it to a charge transfer band of ferrohaem a3, equivalent to the 'band III' or 'conformational band' of haemoglobin.

Type: Article
Title: Detection of a near infra-red absorption band of ferrohaem a3 in cytochrome c oxidase.
Location: England
Keywords: Animals, Carbon Monoxide, Cattle, Electron Transport Complex IV, Oxidation-Reduction, Photolysis, Spectrophotometry, Spectrophotometry, Infrared
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Structural and Molecular Biology
URI: http://discovery.ucl.ac.uk/id/eprint/10026609
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