1QTS:
reference: Crystal structure of the alpha appendage of AP-2 reveals a recruitment platform for clathrin-coat assembly., Traub LM, Downs MA, Westrich JL, Fremont DH, Proc Natl Acad Sci U S A 1999 Aug 3;96(16):8907-12. PMID: 10430869

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).