USP7 and melanoma: Protein analysis in metastatic melanoma tumor tissues showed that with high ac-DNMT1 (p = 0.006, n = 59), or concurrent high ac-DNMT1 with low DNMT1 (p = 0.05, n = 27), or high TIP60 (p = 0.007, n = 41), or high USP7 (p = 0.01, n = 48) consistently showed better 4-year melanoma-specific survival (MSS).