SRSF1 and exocrine pancreatic carcinoma: Among the genes with well established AS patterns whose derived alternative proteins affect tumor cell behavior is the SRPK1 kinase that in breast, colonic and pancreatic carcinomas phosphorylates the splicing factor SF2/ASF, allowing import to the nucleus, where it modulates AS of multiple target mRNAs, such as BIN1, S6K1, MNK2, contributing to tumor progression [15,16].