In addition, relative SAMMSON expression increased in melanoma cell lines (A375, A875, SK-MEL-28, and M21) but not in renal carcinoma cell lines (ACHN, CaKi-1, and 786-O) or the non-tumorigenic cell lines HaCaT and HK-2 (Figure 1(e)). This evidence concerns the gene SAMMSON and melanoma.