title: Structure of beta-poly-L-alanine: refined atomic co-ordinates for an anti-parallel beta-pleated sheet.
mesh_terms: D000409:Alanine; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003460:Crystallization; D008433:Mathematics; D008961:Models, Structural; D010455:Peptides; D014961:X-Ray Diffraction
chemical_list: D010455:Peptides; D000409:Alanine