title: X-ray diffraction studies of helical biopolymers and biological structures.
mesh_terms: D001704:Biopolymers; D002462:Cell Membrane / Q000648:ultrastructure; D004926:Escherichia coli / Q000648:ultrastructure; D008968:Molecular Conformation; D010455:Peptides; D011506:Proteins; D011709:Pyocins; D014961:X-Ray Diffraction
chemical_list: D001704:Biopolymers; D010455:Peptides; D011506:Proteins; D011709:Pyocins