A potent, selective, cell-permeable calmodulin antagonist. It inhibits calmodulin-dependent enzymes such as MLC kinase (IC50=8 µM) and phosphodiesterase I (IC50=0.53 µM). Purity: ≥98% (TLC). Solubility: Soluble in DMSO (25 mg/ml) or ethanol (25 mg/ml). Long Term Storage: -20°C.