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Malignant cells showed weak to moderate cytoplasmic positivity. Cases of squamous cell carcinomas, endometrial and colorectal cancers showed strong staining. Renal cancers and a majority of malignant lymphomas were negative.
Weak to moderate cytoplasmic positivity, with a granular pattern was observed in most malignant tissues. Occasional cases of colorectal and endometrial cancers were strongly stained. Malignant lymphomas and renal cancers were in general negative.
The protein encoded by this gene is a member of the serine/threonine protein kinase family. This kinase was shown to be activated rapidly during Fas-mediated apoptosis in Jurkat cells. In response to Fas receptor ligation, it phosphorylates TIA1, an apoptosis-promoting nuclear RNA-binding protein. The encoded protein is a strong inducer of lymphocyte apoptosis. Two transcript variants encoding different isoforms have been found for this gene. Other variants exist, but their full-length natures have not yet been determined. [provided by RefSeq, Jul 2008]