Investigations with human melanoma cell lines and clinical tissue samples demonstrate that PLX4720 (a precursor of PLX4032) (Tsai et al.,2008) treatment leads to increased expression of MDAs, such as PMEL (Boni et al., 2010; Frederick et al.,2013). As D4M cells are sensitive to PLX4032, we treated cells with PLX4032 and analyzed mRNA levels of Pmel. In D4M.3A and D4M.7A cell lines, basal levels of Pmel were relatively low and comparable to levels in 3T3 cells