Macrophage inflammatory protein 3 beta (MIP-3-alpha or C-C motif chemokine 19) is is a cytokine that plays a role in inflammatory and immunological responses as well as normal lymphocyte recirculation and homing. MIP-3-beta also is important in T-cell trafficking in the thymus, and T-cell and B-cell migration to secondary lymphoid organs. MIP-3-beta specifically binds to the chemokine receptor CCR7.  Recombinant Mouse MIP-3 alpha has a MW of 7.9 kDa, comprised of 70 amino acids.

Recombinant Mouse Macrophage Inflammatory Protein-3-beta (CCL 19) is an important chemoattractant for dendritic cells, antigen-engaged B-cells and effector-memory T-cells, signaling specifically through the CCR7 receptor. This cytokine plays a role in promoting encounters between recirculating T-cells and dendritic cells and in the migration of activated B-cells into the T-zone of secondary lymphoid tissues. Recombinant mouse MIP-3-beta is a polypeptide chain consisting of 83 amino acids with a MW of 9.2 kDa.