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Several cases of pancreatic, breast, colorectal, urothelial and liver cancers showed moderate to strong cytoplasmic and membranous positivity. Remaining malignancies were negative or weakly stained.
The protein encoded by this gene plays a direct regulatory role in calcium-ion-dependent exocytosis in both endocrine and exocrine cells and plays a key role in insulin secretion by pancreatic cells. This gene is likely a tumor suppressor. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Jun 2010]