Dual specificity protein tyrosine phosphatases (dsPTPs) are a subfamily of protein tyrosine phosphatases implicated in the regulation of mitogen-activated protein kinase (MAPK). MKP-1 (also known as CL100, 3CH134, Erp, and hVH-1) exemplifies a class of dual-specificity phosphatase able to reverse the activation of MAP kinases by dephosphorylating critical tyrosine and threonine residues. MKP-3 is 36% identical to MKP-1 and it blocks both the phosphorylation and enzymatic activation of ERK2 by mitogens. MKP-3 mRNA is expressed in lung, heart, brain, and kidney, but not significantly in skeletal muscle or testis

RAT

2-8°C (short-term); -20°C (long-term)