共查询到20条相似文献,搜索用时 15 毫秒
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J E Campillo T Quesada E Sánchez-Cantalejo J Osorio C Osorio 《Revista Espanola de Fisiología》1976,32(1):33-36
Important kinetic aspects of renin reaction were studied in order to evaluate the parameters that regulate the formation rate of angiotensin I. This rate decreased throughout the incubation period of normal rat plasma and it showed a linear increase when plasma was incubated with renin-substrate. When renin was added to normal rat plasma a plateau in the angiotensin I formation rate occurred after 4-6 hours. When plasma samples containing increasing amounts of renin-substrate were incubated, the velocity of their reaction increased in proportion to the renin-substrate concentration. Under these incubation conditions, the reaction between endogenous renin and renin-substrate in normal rat plasma, proved to be a first kinetic order with respect to the substrate. 相似文献
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T Kurihara 《Seikagaku. The Journal of Japanese Biochemical Society》1978,50(10):1054-1061
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Francis C. Knowles 《Biochemical and biophysical research communications》1980,92(3):1060-1065
The hemoglobin-oxygen equilibrium binding curve was found to be sensitive to the addition of inositol hexaphosphate at pH 9.1. A solution of hemoglobin A in 0.050 sodium borate was half-saturated with oxygen at a partial pressure of 0.55mm Hg. Hemoglobin A in 0.050 sodium borate, 0.001 inositol hexaphosphate, pH 9.1 was half-saturated with oxygen at a partial pressure of 0.95mm Hg. The Hill plot was linear with a slope of 2.0 in the absence of phosphates. In the presence of inositol hexaphosphate the slope of the Hill plot increased from 1.0 to 2.36. The dependence of fractional saturation of hemoglobin with oxygen on concentration of inositol hexaphosphate was determined at partial pressures of oxygen of 0.46 and 1.07mm Hg. 相似文献