Macrophage inflammatory protein 2 (MIP-2 or CXCL2), is a small cytokine secreted by monocytes and neutrophils at sites of inflammation. MIP-2 functions through CXCR2, a chemokine receptor,to act as a chemotactic agent for leukocytes and hematopoietic cells. Macrophage inflammatory protein 2 (MIP-2 or CXCL2), is a small cytokine secreted by monocytes and neutrophils at sites of inflammation. MIP-2 functions through CXCR2, a chemokine receptor,to act as a chemotactic agent for leukocytes and hematopoietic cells. Alternative name: MIP-2, CXCL2. Purity: ≥95% (SDS-PAGE). Formulation: Lyophilized from a sterile (0.2 micron) filtered aqueous solution containing 10 mM sodium phosphate, pH 7.5. Source: Produced in E. coli. Long Term Storage: -80°C.