4PXU:
reference: Structural basis for the assembly of the mitotic motor Kinesin-5 into bipolar tetramers., Scholey JE, Nithianantham S, Scholey JM, Al-Bassam J, Elife. 2014 Apr 8;3:e02217. doi: 10.7554/eLife.02217. PMID: 24714498

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