4HZK:
reference: Structural basis for cooperativity of CRM1 export complex formation., Monecke T, Haselbach D, Voss B, Russek A, Neumann P, Thomson E, Hurt E, Zachariae U, Stark H, Grubmuller H, Dickmanns A, Ficner R, Proc Natl Acad Sci U S A. 2013 Jan 15;110(3):960-5. doi: 10.1073/pnas.1215214110., Epub 2012 Dec 31. PMID: 23277578

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