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Description

A solution of H-89, Dihydrochloride (Cat. No. 371963) in anhydrous DMSO. H-89 is a cell-permeable selective and potent inhibitor of protein kinase A (Ki = 48 nM). Inhibits other kinases at several fold higher concentrations: myosin light chain kinase (Ki = 28.3 microM), Ca2+/calmodulin-dependent protein kinase II (Ki = 29.7 microM), protein kinase C (Ki = 31.7 microM), casein kinase I (Ki = 38.3 microM), and Rho Kinase II (IC50 = 270 nM). May be used to discriminate between the effects of PKA and cAMP-regulated guanine-nucleotide-exchange factors (GEFs), such as GEFI or Epac (exchange protein directly activated by cAMP) and GEFII. Reported to induce neurite formation in NG 108-15 cells (~1 microM) by blocking the action of Rho kinase II.