Low XIAP expression was found in primary melanocytes, MeWo and IGR cells, whereas XIAP is absent in HaCaT keratinocytes as previously described.22 In contrast, cIAP2 expression was only detected at low levels in A375 and EP cells, but undetectable in primary melanocytes, nevus cells, and all other melanoma cell lines. This evidence concerns the gene XIAP and nevus.