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This study objective was to express and characterize the catalytic domain of the human T cell protein tyrosine phosphatase(ΔTC-PTP) and to study immunohistochemicaily the expression of ΔTC-PTP in human non-small cell lung cancers. ΔTC-PTP gene was PCR amplified with the cDNA of human TC-PTP as template, and cloned into the pT7 expression vector. The recombinant pT7-ΔATC-PTP was expressed in E. coli...
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