1KCU:
reference: Epitope recognition by diverse antibodies suggests conformational convergence in an antibody response., Nair DT, Singh K, Siddiqui Z, Nayak BP, Rao KV, Salunke DM, J Immunol 2002 Mar 1;168(5):2371-82. PMID: 11859128

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