[Dynamics of coiled DNA by the light scattering method].

Quasielastic light scattering investigation of the intrinsic dynamics of the macromolecules in solution is discussed. The character of the spectrum is analysed. The particular case of gaussian chain is discussed in detail. The results of experimental investigation of T7 phage DNA intrinsic dynamics are presented. Due to the regularization procedure it became possible to separate the contributions of pure diffusional and the first relaxation modes. The angular dependence of these modes relaxation time is determined. The results are compared with the Rouse--Zimm theory predictions. It is shown, that the preliminary averaging of the diffusion tensor leads to the qualitative disagreement with the experiment.