Effects of 3’-hydroxy puerarin on improving insulin resistance in 3T3-L1 adipocytes and their mechanisms Change of tyrosine kinase and phosphatase activity in K562 cells induced by matrine Research progress on natural products on new targets of type 2 diabetes PTP1B inhibitory activities of bromophenol derivatives from Protein Tyrosine Phosphatases Mediate the Signaling Pathway of Stomatal Closure of Vicia faba L. Protein Phosphatases and Signaling Cascades in Higher Plants Protein tyrosine phosphatase 1B and type Ⅱ diabetes treated with Chinese materia medica