2QYF:
reference: p31comet blocks Mad2 activation through structural mimicry., Yang M, Li B, Tomchick DR, Machius M, Rizo J, Yu H, Luo X, Cell. 2007 Nov 16;131(4):744-55. PMID: 18022368

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