title: A possible model of hemoprotein-fatty acid peroxide complex demonstrated by electron spin resonance.
abstract: Coordination reaction between linolenic-acid-hydroperoxide (LHPO) and chloro(5, 10, 15, 20-tetraphenyl)-porphyrinato iron (III), Fe(III)TPPCl, was investigated by means of ESR. ESR spectra of the ferric low-spin complex (g1 = 2.336, g2 = 2.174 and g3 = 1.929) was recorded for the mixture prepared by mixing Fe(III)TPPCl and LHPO at -78 degrees C in the presence of alkaline reagent. ESR line width of complex was broadened when 17O2 labeled LHPO was used for ESR measurement. In terms of the g-parameters of the ferric low-spin species, this complex was concluded to be Fe(III)TPP(-OCH3)(-OO-linolenic acid) type complex.
authors.affiliation: Department of Chemistry, Faculty of Science, Ehime University, Matsuyama, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tajima
authors.forename: M
authors.initials: M
authors.lastname: Shigematsu
authors.forename: J
authors.initials: J
authors.lastname: Jinno
authors.forename: Y
authors.initials: Y
authors.lastname: Kawano
authors.forename: K
authors.initials: K
authors.lastname: Mikami
authors.forename: K
authors.initials: K
authors.lastname: Ishizu
authors.forename: H
authors.initials: H
authors.lastname: Ohya-Nishiguchi
authors.forename: M
authors.initials: M
authors.lastname: Shigamatsu
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D005290:Ferric Compounds; D006420:Hemeproteins; D008041:Linoleic Acids; D008054:Lipid Peroxides; D008665:Metalloporphyrins; D008956:Models, Chemical; D015394:Molecular Structure
chemical_list: D005290:Ferric Compounds; D006420:Hemeproteins; D008041:Linoleic Acids; D008054:Lipid Peroxides; D008665:Metalloporphyrins; C062664:chloro(5,10,15,20-tetraphenyl)porphyrinatoiron(III)