A versatile spectrophotometric protein tyrosine phosphatase assay based on 3-nitrophosphotyrosine containing substrates.
A versatile assay for protein tyrosine phosphatases (PTP) employing 3-nitrophosphotyrosine containing peptidic substrates is described. These therapeutically important phosphatases feature in signal transduction pathways. The assay involves spectrophotometric detection of 3-nitrotyrosine production from 3-nitrophosphotyrosine containing peptidic substrates, which are accepted by many PTPs. Compared to conventional chromogenic phosphate derivatives, the more realistic peptidic substrates allow...Expand abstract
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