2NCO:
reference: Solution NMR structures of the C-domain of Tetrahymena cytoskeletal protein Tcb2 reveal distinct calcium-induced structural rearrangements., Kilpatrick AM, Honts JE, Sleister HM, Fowler CA, Proteins. 2016 Aug 2. doi: 10.1002/prot.25111. PMID: 27488393

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