4OFQ:
reference: Structure of the C-terminal domain of AspA (antigen I/II-family) protein from Streptococcus pyogenes., Hall M, Nylander S, Jenkinson HF, Persson K, FEBS Open Bio. 2014 Mar 12;4:283-9. doi: 10.1016/j.fob.2014.02.012. eCollection, 2014. PMID: 24918040

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