3ODU X-ray 2.50 A CXCR4_HUMAN P61073 3OE0 X-ray 2.90 A CXCR4_HUMAN P61073 3OE6 X-ray 3.20 A CXCR4_HUMAN P61073 3OE8 X-ray 3.10 A CXCR4_HUMAN P61073 3OE9 X-ray 3.10 A CXCR4_HUMAN P61073