Chemokines are a large group of proteins that attract white blood cells. The chemokines are involved in a wide variety of processes including acute and chronic types of inflammation, infectious diseases, and cancer. Chemokines may lure cancer cells and help determine the sites to which cancer cells spread by metastasis. A chemokine induces a response from a cell causing the cell to make some kind of change in its movement by speeding it up, slowing it down or changing its direction. The first chemokine to be identified was interleukin-8 (IL-8). A chemokine receptor is a molecule that receives a chemokine in a chemokine dock (located on a cell wall).