Features of organic nonelectrolyte binding to the erythrocyte membrane

: The capacity of erythrocyte membranes for organic nonelectrolytes from different chemical groups of chemical compounds was studied by the spin probe method and scanning electron microscopy. Hydrophobic spin-labeled derivatives of gamma-carbolin and stearic acid and the screened phenol antioxidant fenozan-1 were used as nonelectrolytes. Based on the analysis of electron spin resonance spectra of the hydrophobic spin-labeled nonelectrolytes and electron micrographs of erythrocytes, differences in the capacity of distribution regions in the intramembrane space of the derivative of gamma-carbolin and fenozan-1, on the one hand, and the spin-labeled derivative of fatty acid, on the other hand, were found. The first group has at least two membrane distribution regions, whereas in the second case only one type of distribution was found. The influence of limited membrane capacity on the realization of biological activity of organic nonelectrolytes is discussed.