Macrophage inflammatory protein 2 (MIP-2), also known as CXCL2, GRO-β, GRO-2, MIP-2α, and SCYB2, is a cytokine secreted by macrophages, monocytes, and epithelial cells in response to cell injury. MIP-2 is a chemoattractant, recruiting neutrophils to the site of injury and mediating inflammatory response. MIP-2 plays a role in melanoma, multiple sclerosis, and inflammation of the lungs and liver.