【摘要】 以两相法提取纯化绿豆下胚轴质膜微囊,材料与两相体系重量之比为32∶8时,一次洗膜就可以得到纯度较高的质膜微囊。提取缓冲液中牛血清白蛋白的浓度对质膜H+-ATPase的潜在活性有影响。质膜H+-ATPase水解活性依赖于Mg2+,Ca2+对酶活性有明显的促进作用。壳梭孢素(fusicoccin, FC)对酶有明显的刺激作用,活体条件最大刺激达到72%,而离体条件下刺激为30%。更多还原

【Abstract】 The aqueous two-phase partition method was used to isolate and purify plasma membrane(PM) vesicles from mung bean hypocotyls. The PM vesicles were purified well when the proportionof the weight of hypocotyls and two-phase partition reached 32:8. Bovine serum albumin in homog-enization medium influenced the latency activity of the PM H+-ATPase. The enzyme hydrolysisactivity was Mg2+ dependent and was strongly stimulated byCa2+. Fusicoccin (FC), an activator ofPM H+-ATPase, stimulated the enzyme activity with the maximal increase of 72% in vivo and of 30%in vitro as compared with control.更多还原