title: A theoretical study of receptor site models for trimethylammonium group interaction.
mesh_terms: D001665:Binding Sites; D008745:Methylation; D008956:Models, Chemical; D008968:Molecular Conformation; D011789:Quantum Theory; D000644:Quaternary Ammonium Compounds; D011955:Receptors, Drug; D013329:Structure-Activity Relationship
chemical_list: D000644:Quaternary Ammonium Compounds; D011955:Receptors, Drug