4BJ8:
reference: Zebavidin - an avidin-like protein from zebrafish., Taskinen B, Zmurko J, Ojanen M, Kukkurainen S, Parthiban M, Maatta JA, Leppiniemi J, Janis J, Parikka M, Turpeinen H, Ramet M, Pesu M, Johnson MS, Kulomaa MS, Airenne TT, Hytonen VP, PLoS One. 2013 Oct 24;8(10):e77207. doi: 10.1371/journal.pone.0077207. PMID: 24204770

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