2YXJ:
reference: Crystal structure of ABT-737 complexed with Bcl-xL: implications for selectivity of antagonists of the Bcl-2 family., Lee EF, Czabotar PE, Smith BJ, Deshayes K, Zobel K, Colman PM, Fairlie WD, Cell Death Differ. 2007 Sep;14(9):1711-3. Epub 2007 Jun 15. PMID: 17572662

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