3RA5:
reference: Stabilizing salt-bridge enhances protein thermostability by reducing the heat capacity change of unfolding., Chan CH, Yu TH, Wong KB, PLoS One. 2011;6(6):e21624. Epub 2011 Jun 24. PMID: 21720566

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