3FB1:
reference: Purine nucleoside phosphorylase from Schistosoma mansoni in complex with ribose-1-phosphate., D'Muniz Pereira H, Oliva G, Garratt RC, J Synchrotron Radiat. 2011 Jan;18(1):62-5. Epub 2010 Nov 12. PMID: 21169694

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