title: Regulatory protein of bovine tracheal smooth muscle.
abstract: Myosin B exhibiting Ca2+ sensitivity in superprecipitation and Mg-ATPase [EC 3.6.1.3] activity was extracted from tracheal smooth muscle. Repeated washing with 2mM KCl and 1 mM NaHCO3 resulted in the loss of these activities. However, on addition of native tropomyosin, the myosin B regained its original properties. Native tropomyosin is the regulatory system in this smooth muscle.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002417:Cattle; D002645:Chickens; D003429:Cross Reactions; D004789:Enzyme Activation / Q000187:drug effects; D005895:Gizzard, Avian / Q000378:metabolism; D007700:Kinetics; D008274:Magnesium / Q000494:pharmacology; D009130:Muscle, Smooth / Q000378:metabolism*; D009218:Myosins / Q000276:immunology / Q000378:metabolism*; D014132:Trachea / Q000378:metabolism*
chemical_list: D000251:Adenosine Triphosphatases; D009218:Myosins; D008274:Magnesium; D002118:Calcium