title: Structural patterns in globular proteins.
abstract: A simple diagrammatic representation has been used to show the arrangement of alpha helices and beta sheets in 31 globular proteins, which are classified into four clearly separated classes. The observed arrangements are significantly non-random in that pieces of secondary structure adjacent in sequence along the polypeptide chain are also often in contact in three dimensions.
mesh_terms: D008961:Models, Structural; D011487:Protein Conformation