EC 3.1.3.48 (protein-tyrosine-phosphatase) inhibitor An EC 3.1.3.* (phosphoric monoester hydrolase) inhibitor which interferes with the activity of the enzyme protein tyrosine phosphatases (PTPs), EC 3.1.3.48, involved in the removal of phosphate groups from phosphorylated tyrosine residues on proteins. CHEBI:35608 EC 3.1.3.* (phosphoric monoester hydrolase) inhibitor