title: Principles that determine the structure of proteins.
mesh_terms: D006860:Hydrogen Bonding; D008958:Models, Molecular; D010455:Peptides; D011487:Protein Conformation; D011506:Proteins / Q000032:analysis* / Q000145:classification
chemical_list: D010455:Peptides; D011506:Proteins; C011083:polyproline