4UAI:
reference: Structural analysis of a novel small molecule ligand bound to the CXCL12 chemokine., Smith E, Liu Y, Getschman AE, Peterson F, Ziarek JJ, Li R, Volkman BF, Chen Y, J Med Chem. 2014 Oct 30. PMID: 25356720

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