C-C motif chemokine 19 (CCL19)

May play a role not only in inflammatory and immunological responses but also in normal lymphocyte recirculation and homing. May play an essential role in trafficking of T-cells in thymus, and T-cell and B-cell migration to secondary lymphoid organs.

Binds to chemokine receptor CCR7. Recombinant CCL19 shows potent chemotactic activity for T-cells and B-cells but not for granulocytes and monocytes.