2DD8:
reference: Structure of severe acute respiratory syndrome coronavirus receptor-binding domain complexed with neutralizing antibody., Prabakaran P, Gan J, Feng Y, Zhu Z, Choudhry V, Xiao X, Ji X, Dimitrov DS, J Biol Chem. 2006 Jun 9;281(23):15829-36. Epub 2006 Apr 5. PMID: 16597622

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