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Ca(2+)-and Sr(2+)-sensitivity of Akazara scallop troponin
F Shiraishi1, I Ohtsuki, T Ojima
1Department of Clinical Pharmacology, Faculty of Medicine, Kyushu University, Fukuoka.
Fukuoka Igaku Zasshi = Hukuoka Acta Medica
|October 1, 1992
Abstract:
Ca(2+)-and Sr(2+)-sensitivity of desensitized myosin B-tropomyosin was investigated in the presence of troponin prepared from Akazara scallop, rabbit fast skeletal or bovine cardiac muscles. The Sr2+/Ca2+ concentration ratio at 50% activation in the presence of Akazara troponin was in the same range as the ratio in the presence of rabbit fast skeletal troponin, but higher than the ratio in the presence of bovine cardiac troponin.