title: [Several possible conformational states of a homogeneous elastic polymeric chain].
abstract: A homogenous elastic macromolecule, the so-called persistent model is considered. Possible initiation of dense globular state in it with nematic orderliness of the chain elements is analysed. The entropy of such a system in an arbitrary state is calculated. It is shown that a relatively short rigid chain forms a thoroidal structure. With the chain elongation thor is increased, without changing its proportions. When the parameters are changed the thoroidal structure may turn into the conventional one-linkage one. Possible application of this model for solving the problem of trimeric package of nuclei acids is discussed in a few words.
mesh_terms: D001704:Biopolymers; D004548:Elasticity; D046911:Macromolecular Substances; D008433:Mathematics; D008968:Molecular Conformation; D011487:Protein Conformation
chemical_list: D001704:Biopolymers; D046911:Macromolecular Substances
vernacular_title: O nekotorykh vozmozhnykh konformatisionnykh sostoianiiakh odnorodnoĭ uprugoĭ polimernoĭ tsepi.