2BVE:
reference: Crystallographic and in silico analysis of the sialoside-binding characteristics of the Siglec sialoadhesin., Zaccai NR, May AP, Robinson RC, Burtnick LD, Crocker PR, Brossmer R, Kelm S, Jones EY, J Mol Biol. 2007 Feb 2;365(5):1469-79. Epub 2006 Oct 28. PMID: 17137591

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