(-)-Blebbistatin: Selectivity & Specificity
(-)-Blebbistatin is a potent inhibitor of rabbit skeletal muscle myosin II (2160 nM), Myh7b (360 nM), β-cardiac myosin S1 (1120 nM), rabbit skeletal muscle myosin S1 (110 nM), Dictyostelium discoideum myosin II motor domain (3900 nM), Rabbit fast muscle actin and HMM (1000000-5000000 nM), NMIIA. (-)-Blebbistatin exhibits the greatest inhibitory potency toward rabbit skeletal muscle myosin S1 (IC50 = 110 nM).