Selective competitive inhibitor of myosin light chain kinase (IC50 = 50 nM). Displays 4000-fold selectivity over CaM kinase II and does not inhibit PKA. Cell permeable.
HA-100 hydrochloride is a powerful protein kinase inhibitor, exhibiting IC50 values of 4 μM, 8 μM, 12 μM, and 240 μM for cGMP-dependent protein kinase (PKG), cAMP-dependent protein kinase (PKA), protein kinase C (PKC), and MLC-kinase, respectively. Additionally, HA-100 hydrochloride is utilized as a ROCK inhibitor.