5X4A:
reference: Crystal structure of octocoral lectin SLL-2 complexed with Forssman antigen tetrasaccharide., Kita A, Jimbo M, Sakai R, Morimoto Y, Takeuchi R, Tanaka H, Takahashi T, Miki K, Glycobiology. 2017 May 16. doi: 10.1093/glycob/cwx043. PMID: 28510705

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