4IOR:
reference: Different orientations of low-molecular-weight fragments in the binding pocket of a BRD4 bromodomain., Lolli G, Battistutta R, Acta Crystallogr D Biol Crystallogr. 2013 Oct;69(Pt 10):2161-4. doi:, 10.1107/S090744491301994X. Epub 2013 Sep 20. PMID: 24100334

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