Secretion of chemokines from these cells and from primary dark- and light-pigmented primary human melanocytes (1256b and 1603c, respectively) assessed by chemokine antibody array showed that levels of CXCR1/2 ligands were higher in all but one (WM164) melanoma lines as compared to melanocytes (Figure 1B, 1C). Here, CXCR1 is linked to melanoma.