2.7.11.18 ATP + myosin IIB - 2.7.11.18 ATP + myosin light chain - 2.7.11.18 ATP + myosin light chain phosphorylation of myosin light chains by myosin light chain kinase is a key event in agonist-mediated endothelial cell gap formation and vascular permeability 2.7.11.18 ATP + myosin light chain the enzyme phosphorylates the 18000 Da Dictyostelium myosin regulatory light chain 2.7.11.18 ATP + myosin light chain activated MLCK then phosphorylates the regulatory myosin light chains, triggering cross-bridge cycling and contraction, in aortic rings from mice in which alpha1, the major catalytic subunit isoform in arterial smooth muscle, is deleted, KCl- or phenylephrine-induced contraction is increased, overview 2.7.11.18 ATP + myosin light chain involved in myosin phosphorylation and enzyme secretion 2.7.11.18 ATP + myosin light chain obligatory step in development of active tension in smooth muscle 2.7.11.18 ATP + myosin light chain involved in muscle contractility and motility of non-muscle cells 2.7.11.18 ATP + myosin light chain involved in regulation of actin-myosin contractile activity in adrenal medulla 2.7.11.18 ATP + myosin light chain event in initiation of smooth-muscle contraction