This cell line stably expresses the CXCR4 receptor fused to a SNAP-Tag, and can be used in a Tag-lite application..CXCR4 is a receptor for the C-X-C chemokine CXCL12/SDF-1. Compelling evidences suggests that CXCR4 is involved in hematopoiesis and in cardiac ventricular septum formation. The receptor also plays an essential role in vascularization of the gastrointestinal tract. CXCR4 acts as a coreceptor for human immunodeficiency virus-1/HIV-1. This HEK293 stable cell line expresses the CXCR4 receptor fused to a SNAP-Tag. Labeled with Terbium, the cells can be used in a Tag-lite receptor binding protocol..