We selected 6 previously characterized [35,36] melanoma cell lines four of which were known to express (MEL-553B, MEL-1317, MEL-526, MEL-1102) and two known not to express (MEL-836, MEL-1195) gp100 at the transcriptional and protein level (Figure 5) [36,39]. The gene discussed is PMEL; the disease is melanoma.