[Structural characteristics of plasma lipoproteins studied with spin-labelled fatty acids]

As shown by means of electrone paramagnetic resonance of spin probes, a magnitude of ordering of lipoprotein molecular arrangement both internal and external parts of molecule was decreased in a following sequence: high density lipoproteins greater than low density greater than very low density lipoproteins. Permeability towards a reducing agent - ascorbic acid - was altered similarly in the lipoprotein surface monolayer.