Structural Classification of Proteins Structural Classification of Proteins Welcome to SCOP: Structural Classification of Proteins. 1.59 release (15 May 2002). 15979 PDB Entries (1 Mar 2002). 30 Literature References. 39893 Domains (excluding nucleic acids and theoretical models). Folds, superfamilies, and families statistics here. New folds superfamilies families. List of obsolete entries since ...