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Heme A of cytochrome c oxicase. Structure and properties: comparisons with hemes B, C, and S and derivatives


Heme A, isolated from bovine heart muscle by procedures which include extractions into pyridine/chloroform and two-phase, liquid-liquid chromatography on Celite, has been converted to several derivatives. Examination of the proton nuclear magnetic resonance (PMR) spectra and other properties of these derivatives reveals heme A to be the iron complex of 8-formyl-6,-m-bis(2''-hydroxycarbonylethyl)-2-(1'-hydroxy-5',9',13'-trimet hyl-4',8',12'-trans,trans-tetradecatrienyl)-1,3,5-trimethyl-4-vinylporphin . Substituents at the 2,4, and 8 positions are replaced by hydrogen in a resorcinol melt to give cytodeuteroporphin (8-demethyldeuteroporphyrin IX)...

Type Journal
ISBN 0021-9258 (Print)
Authors Caughey, W. S.;Smythe, G. A.;O'Keeffe, D. H.;Maskasky, J. E.;Smith, M. I. :
Publisher Name J BIOL CHEM
Published Date 1975-01-01 00:00:00
Published Volume 250
Published Issue 19
Published Pages 7602-22
Status Published In-print