||Recombinant human Inhibitor-1 with GST tag is a 171-amino acid protein with an average molecular weight of 18.9 kDa. It was expressed inE. coli,50kDa.
||It is a specific inhibitor of Type-1 protein serine/threonine phosphatases. The IC50 for inhibition of PP1 is ~ 1 nm. The selectivity and potency of inhibitor-1 are conferred by its N-terminal sequence KIQF and its activation by phosphorylation at Thr35 catalyzed by protein kinase A. Dephosphorylation and inactivation can be carried out in the presence of Ca2+ by PP2B.
||> 90% by SDS-PAGE.
||1 mg in 50 ml 50 mM Tris-HCl pH 7.0 buffer containing 14 mM b-mercaptoethanol, 1 mM benzamidi 0.1 mM phenylmethanesulfonyl fluoride, 1 mM EDTA and 10% glycerol.
||Maintain preparations in aliquots at -70 °C. Avoid repeated thawing.