4GK9:
reference: Burkholderia oklahomensis agglutinin is a canonical two-domain OAA-family lectin: structures, carbohydrate binding and anti-HIV activity., Whitley MJ, Furey W, Kollipara S, Gronenborn AM, FEBS J. 2013 May;280(9):2056-67. doi: 10.1111/febs.12229. Epub 2013 Apr 2. PMID: 23480609

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