1CN1:
reference: Crystal structure of demetallized concanavalin A: the metal-binding region., Shoham M, Yonath A, Sussman JL, Moult J, Traub W, Kalb AJ, J Mol Biol 1979 Jun 25;131(2):137-55. PMID: 490645

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