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The protein tyrosine phosphatase-1B (PTP1B) and the T-cell protein tyrosine phosphatase (TC-PTP) have been implicated in down-regulation of tyrosine kinase receptors, conferring anti-oncogenic functions to these PTPases. However, recent work has shown that PTP1B is positively implicated in oncogenic properties of breast cancer cells by regulating the ERK pathway. Here, we studied the function of PTP1B...
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