title: Calcium sensitivity of abalone, Haliotis discus, myosin.
abstract: Superprecipitation was observed with abalone myosin and purified rabbit actin in the presence of calcium ions, but was not observed in the absence of calcium. The Mg-ATPase [EC 3.6.1.3] activity of abalone myosin and rabbit actin in the absence of calcium ions (EGTA present) showed about 60% inhibition as compared with values in the presence of calcium ions. The calcium sensitivity may be attributable to abalone myosin, as in the case of scallop myosin.
mesh_terms: D000199:Actins / Q000378:metabolism; D000251:Adenosine Triphosphatases / Q000037:antagonists & inhibitors; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D008274:Magnesium; D008974:Mollusca; D009218:Myosins / Q000378:metabolism*; D011817:Rabbits
chemical_list: D000199:Actins; D000251:Adenosine Triphosphatases; D009218:Myosins; D008274:Magnesium; D002118:Calcium