TFE3 and renal cell carcinoma associated with Xp11.2 translocations/TFE3 gene fusions: To address the role of TFE3 fusion proteins in tRCC, we used 4 cell lines expressing either NONO-TFE3 (lines UOK109, TF1) or PRCC-TFE3 (UOK120, UOK146).