4Q6V:
reference: Structural insights into the lipoprotein outer-membrane regulator of penicillin-binding protein 1B., King DT, Lameignere E, Strynadka NC, J Biol Chem. 2014 May 7. pii: jbc.M114.565879. PMID: 24808177

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