3CSS:
reference: Optimal description of a protein structure in terms of multiple groups undergoing TLS motion., Painter J, Merritt EA, Acta Crystallogr D Biol Crystallogr. 2006 Apr;62(Pt 4):439-50. Epub 2006, Mar 18. PMID: 16552146

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