2PR4:
reference: Structural Details of HIV-1 Recognition by the Broadly Neutralizing Monoclonal Antibody 2F5: Epitope Conformation, Antigen-Recognition Loop Mobility, and Anion-Binding Site., Julien JP, Bryson S, Nieva JL, Pai EF, J Mol Biol. 2008 Sep 18. PMID: 18824005

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