title: The reduced minus oxidized difference spectra of cytochromes a and a3.
abstract: We have re-investigated the reduced minus oxidized difference spectra of the two heme centers of cytochrome oxidase, cytochromes a and a3. In contrast to data obtained in an earlier study (Vanneste, W.H. (1966) Biochemistry 5, 838-848), we find that the spectrum for cytochrome a3 agrees with that found with a 5-coordinate high-spin heme A model compound. Small but significant additional differences are noted for both heme centers.
authors.affiliation: Department of Biochemistry and Cell Biology, Rice University, Houston, TX 77005-1892, USA.
authors.forename: G L
authors.initials: GL
authors.lastname: Liao
authors.forename: G
authors.initials: G
authors.lastname: Palmer
mesh_terms: D003486:Cyanides / Q000737:chemistry; D017936:Cytochrome a Group / Q000737:chemistry*; D004227:Dithionite / Q000494:pharmacology; D003576:Electron Transport Complex IV / Q000737:chemistry* / Q000378:metabolism*; D010084:Oxidation-Reduction; D013053:Spectrophotometry
chemical_list: D003486:Cyanides; D017936:Cytochrome a Group; D004227:Dithionite; D003576:Electron Transport Complex IV