MLANA and melanoma: Using the Melan-A/MART-1 promoter EGFP system in the melanoma cell line MU89, we showed that cells treated with 4 separate Hsp90 inhibitors (17-AAG, 17-AEP, CCT018159, and PU-H71) significantly enhanced the fluorescent reporter signal as early as 2 days (Fig. 4).