title: Conformational studies on sequential polypeptides. Part VII. Structural investigations on (Pro-Phe-Gly)n and (Phe-Pro-Gly)n.
abstract: The conformational properties of (Pro-Phe-Gly)n and (Phe-Pro-Gly)n were investigated both in the solid state and in solution. In solid state X-ray diffraction patterns seem to indicate that (Pro-Phe-Gly)n assumes a single chain triple helical structure. In solution, by circular dichroism studies, it was possible to show the existence of beta-bends in the presence of ethylene glycol. Similar studies carried out on (Phe-Pro-Gly)n showed no collagen or polyproline II-like structure in the solid state. In solution the beta-bend formation was apparent in all the solvent systems studied.
mesh_terms: D002942:Circular Dichroism; D003094:Collagen; D008968:Molecular Conformation; D010455:Peptides; D011108:Polymers; D012996:Solutions; D013055:Spectrophotometry, Infrared; D014961:X-Ray Diffraction
chemical_list: D010455:Peptides; D011108:Polymers; D012996:Solutions; D003094:Collagen