3CKB:
reference: Starch catabolism by a prominent human gut symbiont is directed by the recognition of amylose helices., Koropatkin NM, Martens EC, Gordon JI, Smith TJ, Structure. 2008 Jul;16(7):1105-15. PMID: 18611383

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