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 (K_i = 48 nM). Inhibits other kinases at several fold higher concentrations: myosin light chain kinase (K_i = 28.3 µM), Ca²⁺/calmodulin-dependent protein kinase II (K_i = 29.7 µM), protein kinase C (K_i = 31.7 µM), casein kinase I (K_i = 38.3 µM), 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 µM) by blocking the action of Rho kinase II.

Cell permeable: no

Primary Target
PKA

Product does not compete with ATP.

Reversible: no

Target K_i: 48 nM against protein kinase A

Packaged under inert gas

A 10 mM (1 mg/193 µl) solution of H-89, 2HCl (Cat. No. 371963) in DMSO.

Following initial thaw, aliquot and freeze (-20°C).

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CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Toxicity: Irritant (B)