2WMI:
reference: Differential recognition and hydrolysis of host carbohydrate-antigens by Streptococcus pneumoniae family 98 glycoside hydrolases., Higgins MA, Whitworth GE, El Warry N, Randriantsoa M, Samain E, Burke RD, Vocadlo DJ, Boraston AB, J Biol Chem. 2009 Jul 16. PMID: 19608744

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