2LLE:
reference: Potential of fragment recombination for rational design of proteins., Eisenbeis S, Proffitt W, Coles M, Truffault V, Shanmugaratnam S, Meiler J, Hocker B, J Am Chem Soc. 2012 Mar 7;134(9):4019-22. Epub 2012 Feb 23. PMID: 22329686

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