2KDG:
reference: Solution structure of the first immunoglobulin domain of human myotilin., Heikkinen O, Permi P, Koskela H, Carpen O, Ylanne J, Kilpelainen I, J Biomol NMR. 2009 Jun;44(2):107-12. Epub 2009 May 6. PMID: 19418025

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