1CLY:
reference: The x-ray structure of an anti-tumour antibody in complex with antigen., Jeffrey PD, Bajorath J, Chang CY, Yelton D, Hellstrom I, Hellstrom KE, Sheriff S, Nat Struct Biol 1995 Jun;2(6):466-71. PMID: 7664109

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