2AVW:
reference: Crystal structure of group a streptococcus mac-1: insight into dimer-mediated specificity for recognition of human IgG., Agniswamy J, Nagiec MJ, Liu M, Schuck P, Musser JM, Sun PD, Structure. 2006 Feb;14(2):225-35. PMID: 16472742

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