[Periodic electric field as a possible switch of biopolymer conformation].

A theoretical model describing the effect of periodic electrical fields (PEF) on the conformation of biopolymers is proposed. The biopolymer is interpreted as a system of classical mechanics consisting of subsystems (molecular groups) connected with each other by potential forces. The existence of PEF manifests itself as a periodic inducing force applied to the molecular group. Dissipation of energy is considered on the basis of liquid (viscous) friction. Arguments are presented in favor of non-Newton rheology of the viscous medium and as a consequence of non-linear dependence of the friction force on velocity. It is found that if the periodic field has more than one harmonics, then due to PEF effect the conformation potential can change to the linear in co-ordinate item.