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FEBS Lett. 1995 Jan 30;358(3):233-9.

Characterization of a protein tyrosine phosphatase (RIP) expressed at a very early stage of differentiation in both mouse erythroleukemia and embryonal carcinoma cells.

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  • 1Institute of Molecular and Cellular Biosciences, University of Tokyo, Japan.


From our previous studies, several protein tyrosine phosphatases (PTPase) are implicated in the early events leading to in vitro differentiation of both mouse erythroleukemia (MEL) and embryonal carcinoma (F9) cells. Among the PTPases, recent experiments suggest that a new PTPase (RIP) plays a critical role in differentiation processes, particularly at their early stages. We isolated cDNA clones for RIP from a RNA preparation isolated from differentiating MEL cells, and determined the total 7932 bp base sequence for RIP cDNA. The cDNA codes for a putative 269.8 kDa (2450 amino acids) protein with a PTPase catalytic domain. We have demonstrated that the transcripts exist in multiple forms, and among mouse tissues they were found predominantly in kidney and, to a lesser extent, in lung, heart, brain and testis. The RIP gene was mapped between D5Mit90 and D5Mit25 on mouse chromosome 5.

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