Table 2. IC₅₀ for inhibition of phosphorylation at Thr853 and Thr696 of MYPT1 by the Rho kinase inhibitors.

Target/Function	Y-27632 (nM)	Y-39983 (nM)
Thr853	658	15
Thr696	2270	177
MLC	1065	14
Relaxation	++	+++++