protein_function:
Chemokine(C-C motif) ligand 19(CCL19) is a small cytokine??belonging to the CC chemokine family that is also known as??EBI1 ligand chemokine(ELC) and macrophage inflammatory protein-3-beta??(MIP-3-beta). Using PCR of human-rodent hybrids, the CCL19 gene was map to human chromosome 9p13, and the CCL19 gene is not part of the CC chemokine gene cluster on chromosome 17. The cytokine encoded by this gene may play a role in normal lymphocyte recirculation and homing. It also plays an important role in trafficking of T cells in thymus, and in T cell and B cell migration to secondary lymphoid organs.