NCIt definition : Encoded by Protein Tyrosine Phosphatase Genes, Protein Tyrosine Phosphatases are a
group of enzymes that specifically remove tyrosine-bound phosphate groups from many
phosphoproteins, including many enzymes phosphorylated by a tyrosine kinase. Together
with protein tyrosine kinases, Tyrosine Phosphatases regulate tyrosine phosphorylation
and dephosphorylation in cellular signal transduction and may play a role in cell
growth control and carcinogenesis. (NCI);