Requirement for calcium ions in acetylcholine-stimulated phosphodiesteratic cleavage of phosphatidyl-<i>myo</i>-inositol 4,5-bisphosphate in rabbit iris smooth muscle
1. The mechanism of acetylcholine-stimulated breakdown of phosphatidyl-myo-inositol 4,5-bisphosphate and its dependence on extracellular Ca2+ was investigated in the rabbit iris...