1VMC:
reference: Mapping the binding of the N-terminal extracellular tail of the CXCR4 receptor to stromal cell-derived factor-1alpha., Gozansky EK, Louis JM, Caffrey M, Clore GM, J Mol Biol 2005 Jan 28;345(4):651-8. PMID: 15588815

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