PBRM1 and nonpapillary renal cell carcinoma: Interestingly, there is a relationship between BAF180 and HIF1α protein expression, in which cell lines lack BAF180 protein expression (SLR25, A704 and RCC4) expressed full-length HIF1α protein (Figure 1a, indicated by a red arrow), whereas the BAF180-expressing ccRCC cell lines lacked HIF1α protein detection (KC-12, 769-P, 786-O and RCC10) or expressed truncated/non-functional HIF1α proteins (SLR23 and A498; Figure 1a).