Macrophage Inflammatory Protein 3, also known as CCL23, is located on the p-arm of chromosome 9 with other CC cytokine genes which are involved in immunoregulatory and inflammatory processes. In patients with rheumatoid arthritis, high levels on CCL23(19-99) have been found in synovial fluids. This protein is known to have interaction with CCR1, CCR10, CCR2, CCR3 and CCR4.