The C-X-C motif chemokine CXCL12 binds to one single chemokine receptor, CXCR4, to mediate cell-type specific physiological processes, including cellular migration, survival, and apoptosis. CXCL12 and its receptor CXCR4 play a role in many different diseases, including cancer, HIV, and rheumatoid arthritis. Mouse CXCL12 Recombinant Protein is purified CXCL12 produced in yeast.