[A comparison of the models of a thin filament in the muscle with low-angle X-ray diffraction data obtained for the relaxed rabbit muscle].

The models of a thin filament based on different structures of G-actin and the modes of their packing into helical structure have been compared with the experimental data obtained on thin bundles of skeletal muscle fibres in the relaxed state. The contribution of the main components of the thin filament to the intensity of the actin layer lines was studied. The best fit to the observed actin layer lines was achieved with the new F-actin structure based on the latest model of actin monomer 3BYH.PDB.