1BYF:
reference: The structure of a tunicate C-type lectin from Polyandrocarpa misakiensis complexed with D -galactose., Poget SF, Legge GB, Proctor MR, Butler PJ, Bycroft M, Williams RL, J Mol Biol 1999 Jul 23;290(4):867-79. PMID: 10398588

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