4K5U:
reference: Recognition of the Thomsen-Friedenreich pancarcinoma carbohydrate antigen by a lamprey variable lymphocyte receptor., Luo M, Velikovsky CA, Yang X, Siddiqui MA, Hong X, Barchi JJ, Gildersleeve JC, Pancer Z, Mariuzza RA, J Biol Chem. 2013 Jun 19. PMID: 23782692

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