title: Electron spin echo studies of hemoglobin cyanide and nitroxide derivatives.
abstract: Electron spin echo envelope modulation studies are performed on human hemoglobin cyanide, hemoglobin nitroxide and hemoglobin nitroxide + inositol hexaphosphate at neutral pH. The modulation data are Fourier transformed and are analyzed in the frequency domain. The frequency components observed from hemoglobin cyanide indicate modulation from the coordinated nitrogen N-1 of the proximal imidazole (His-F8). In the case of hemoglobin nitroxide, the binding of inositol hexaphosphate causes the nitrogen N-3 of the proximal imidazole to be protonated in some of the subunits. From a comparison with other studies on these derivatives of hemoglobin, these subunits are identified as the alpha-subunits.
authors.affiliation: School of Physics, University of Hyderabad, India.
authors.forename: Y V
authors.initials: YV
authors.lastname: Krishna
authors.forename: B
authors.initials: B
authors.lastname: Aruna
authors.forename: P A
authors.initials: PA
authors.lastname: Narayana
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D005583:Fourier Analysis; D006454:Hemoglobins; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010833:Phytic Acid / Q000378:metabolism
chemical_list: D006454:Hemoglobins; C011207:cyanhemoglobin; C008657:nitrosyl hemoglobin; D010833:Phytic Acid