3DQX:
reference: Activation of tyrosine kinases by mutation of the gatekeeper threonine., Azam M, Seeliger MA, Gray NS, Kuriyan J, Daley GQ, Nat Struct Mol Biol. 2008 Oct;15(10):1109-18. Epub 2008 Sep 14. PMID: 18794843

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