6GRQ:
reference: Structure and flexibility of the extracellular region of the PirB receptor., Vlieg HC, Huizinga EG, Janssen BJC, J Biol Chem. 2019 Mar 22;294(12):4634-4643. doi: 10.1074/jbc.RA118.004396. Epub, 2019 Jan 23. PMID: 30674550

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