2PMS:
reference: Structure of a Complex of Human Lactoferrin N-lobe with Pneumococcal Surface Protein A Provides Insight into Microbial Defense Mechanism., Senkovich O, Cook WJ, Mirza S, Hollingshead SK, Protasevich II, Briles DE, Chattopadhyay D, J Mol Biol. 2007 Jul 20;370(4):701-13. Epub 2007 May 10. PMID: 17543335

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