2FHF:
reference: Crystal structure of pullulanase: evidence for parallel binding of oligosaccharides in the active site., Mikami B, Iwamoto H, Malle D, Yoon HJ, Demirkan-Sarikaya E, Mezaki Y, Katsuya Y, J Mol Biol. 2006 Jun 9;359(3):690-707. Epub 2006 Apr 18. PMID: 16650854

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