title: Structure-reactivity relations of imidazole in polypeptides. II. Structural transitions and a   -structure in poly-L-histidine solutions.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002942:Circular Dichroism; D004355:Drug Stability; D006639:Histidine; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles; D007259:Infrared Rays; D008970:Molecular Weight; D010455:Peptides; D011108:Polymers; D013053:Spectrophotometry; D013696:Temperature; D014461:Ultracentrifugation; D014466:Ultraviolet Rays; D014867:Water
chemical_list: D007093:Imidazoles; D010455:Peptides; D011108:Polymers; D014867:Water; D006639:Histidine