Y-33075 is potent and selective p160ROCK inhibitor with an Ki value of 0.14 uM, > 200 fold selectivity for p160ROCK than PKC, cAMP-dependent protein kianse and Mypsin light-chain kinase.

IC50 value: 0.14 uM (Ki) [1]

Target: p160ROCK

Y-27632 is a representative compound which potently inhibits phenylephrine-induced contraction of rabbit aortic strips, with a half-maximal inhibitory concentration (IC50) of 0.7 uM ; however, it had little effect on contraction induced by potassium chloride (IC50 > 30 uM).