2QYJ:
reference: Stabilizing ionic interactions in a full-consensus ankyrin repeat protein., Merz T, Wetzel SK, Firbank S, Pluckthun A, Grutter MG, Mittl PR, J Mol Biol. 2008 Feb 8;376(1):232-40. Epub 2007 Nov 22. PMID: 18155045

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