4R4Y:
reference: Structural Basis of a Point Mutation that Causes the Genetic Disease Aspartylglucosaminuria., Sui L, Lakshminarasimhan D, Pande S, Guo HC, Structure. 2014 Dec 2;22(12):1855-61. doi: 10.1016/j.str.2014.09.014. Epub 2014, Nov 13. PMID: 25456816

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