2DDN:
reference: Construction of a 3D model of CP12, a protein linker., Gardebien F, Thangudu RR, Gontero B, Offmann B, J Mol Graph Model. 2006 Oct;25(2):186-95. Epub 2006 Jan 19. PMID: 16427344

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