title: [Letter: Stereochemical theory of the secondary structure of globular proteins. I. General propositions].
mesh_terms: D008956:Models, Chemical; D011487:Protein Conformation; D013237:Stereoisomerism
vernacular_title: Stereokhimicheskaia teoriia vtorichnoĭ struktury globuliarnykh belkov. I. Obshchie polozheniia