1KIB:
reference: Structure of cytochrome c6 from Arthrospira maxima: an assembly of 24 subunits in a nearly symmetric shell., Kerfeld CA, Sawaya MR, Krogmann DW, Yeates TO, Acta Crystallogr D Biol Crystallogr 2002 Jul;58(Pt 7):1104-10. PMID: 12077429

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