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Cancer tissues showed weak to moderate nuclear staining. Several cases of prostate cancers along with few cases of renal and breast cancers displayed additional cytoplasmic immunoreactivity. Several cases of colorectal cancers along with few cases of pancreas, stomach and testis cancers exhibited additional membranous positivity.
This gene encodes a nuclear protein that regulates transcriptional elongation and pre-mRNA splicing. The encoded protein interacts with the hyperphosphorylated C-terminal domain of RNA polymerase II via multiple FF domains, and with the pre-mRNA splicing factor SF1 via a WW domain. Alternative splicing results in multiple transcripts variants encoding different isoforms. [provided by RefSeq, Jul 2008]