以玉米叶片原生质为研究对象,以ANS(1-苯胺基-8-萘磺酸)作荧光探剂,用荧光标记法研究了毒素与质膜蛋白的互作.在被ANS标记后的原生质悬浮液中加入不同浓度HT-毒素后,ANS荧光强度明显增加,呈现出了剂量-效应关系,表明HT-毒素与质膜上ANS某些受体发生了互作.本实验采用2种试剂,从2个角度表明了ANS受体和质膜上存在的毒素受体具有蛋白特性.初步推测HT-毒素特异性组分的原初作用位点在质膜外侧.
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