4FCH:
reference: Multi-domain carbohydrate-binding proteins involved in Bacteroides thetaiotaomicron starch metabolism., Cameron EA, Maynard MA, Smith CJ, Smith TJ, Koropatkin NM, Martens EC, J Biol Chem. 2012 Aug 21. PMID: 22910908

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