title: [Mechanisms of induced processes in aqueous hemoglobin solutions at 77 K].
abstract: ESR spectra of gamma-irradiated and frozen at 77 K human oxyhemoglobin and partially denaturated methemoglobin solutions were analysed. The quartet signal ascribed to the anion-radical of proximal histidine was shown to dominate in the spectra of both solutions. The spectra of methemoglobin solution irradiated with relatively small doses have an intensive singlet ascribed to the stabilized electron. The formation mechanism of free radicals is discussed.
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D005615:Freezing; D005720:Gamma Rays; D006454:Hemoglobins / Q000032:analysis / Q000528:radiation effects*; D006801:Humans; D008706:Methemoglobin / Q000032:analysis / Q000528:radiation effects; D010108:Oxyhemoglobins / Q000032:analysis / Q000528:radiation effects
chemical_list: D006454:Hemoglobins; D010108:Oxyhemoglobins; D008706:Methemoglobin
vernacular_title: O mekhanizme indutsirovannykh protsessov v vodnykh rastvorakh gemoglobina pri 77 K.