2JGZ:
reference: Cyclin B and cyclin A confer different substrate recognition properties on CDK2., Brown NR, Lowe ED, Petri E, Skamnaki V, Antrobus R, Johnson LN, Cell Cycle. 2007 Jun;6(11):1350-9. Epub 2007 Jun 11. PMID: 17495531

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