title: [Modulation of the intensity of fluorescence of aqueous solutions of proteins by magnetic field].
abstract: Effect of the constant magnetic field with up to 3.2 X 10(-4) A/m intensity on the fluorescence of papain aqueous solutions was investigated. It has been shown that depending on the magnetic field direction a reversible decrease or increase of fluorescence intensity takes place. The variation of fluorescence intensity under the influence of magnetic field is maximal under excitation at long wave ultra-violet light. The effect increases with the increase of temperature, increases linearly with the increase of magnetic field intensity but doesn't depend on protein concentration in diluted solutions. The examination of the data leads to the conclusion on the existence of two possible mechanisms: the variation of properties of surface tryptophan residues environment and paramagnetic orientation of protein globule under the influence of a magnetic field.
authors: R E
authors: RE
authors: Shikhlinskaia
authors: V I
authors: VI
authors: Lobyshev
authors: B D
authors: BD
authors: Ryzhikov
mesh_terms: D005453:Fluorescence; D066298:In Vitro Techniques; D008280:Magnetics; D010206:Papain / Q000737:chemistry / Q000528:radiation effects; D011506:Proteins / Q000737:chemistry / Q000528:radiation effects*; D012996:Solutions; D013050:Spectrometry, Fluorescence
chemical_list: D011506:Proteins; D012996:Solutions; D010206:Papain
vernacular_title: Moduliatsiia intensivnosti fluorestsentsii vodnykh rastvorov belkov magnitnym polem.