Chemotaxis Induced by CCL19/MIP‑3 beta and Neutralization by Mouse CCL19/MIP‑3 beta Antibody. Recombinant Mouse CCL19/|
MIP‑3 beta (Catalog # 440-M3) chemoattracts the BaF3 mouse pro‑B cell line transfected with human CCR7 in a dose-dependent manner (orange line). The amount of cells that migrated through to the lower chemotaxis chamber was measured by Resazurin (Catalog # AR002). Chemotaxis elicited by Recombinant Mouse CCL19/MIP‑3 beta (50 ng/mL) is neutralized (green line) by increasing concentrations
of Rat Anti‑Mouse CCL19/
MIP‑3 beta Monoclonal Antibody (Catalog # MAB880). The ND50 is typically 3-15 µg/mL.
CCL19/MIP-3 beta, also known as ELC (EBI1-Ligand Chemokine), is a beta chemokine that binds specifically to the chemokine receptor CCR7/EBI-1/BLR-2. Mouse (human) CCL19 cDNA encodes a 108 (98) amino acid precursor protein with a predicted 25 (21) aa signal peptide that is cleaved to form the 83 (77) aa mature secreted protein. CCL19 is distantly related to other beta chemokines (20 - 30% aa sequence identity). Mouse CCL19 shares 83% aa sequence homology with human CCL19. CCL19 has been shown to be constitutively expressed in various lymphoid tissues (including thymus, lymph nodes, appendix, and spleen) in dendritic cells within the T-cell zone. The expression of CCL19 is down-regulated by the anti-inflammatory cytokine IL-10. Recombinant CCL19 has been shown to be chemotactic for T-cells and B-cells. The CCL19 receptor (CCR-7/EBI-1/BLR-2) is expressed in various lymphoid tissues and activated B and T lymphocytes. CCR7 is also strongly up‑regulated in B-cells infected with Epstein-Barr virus and T-cells infected with herpesvirus 6 or 7.
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