眼镜王蛇神经毒素的提纯及其性质的研究

被引:2
作者
刘静芳
机构
[1] 河北医学院生化教研室
关键词
眼镜王蛇蛇毒; 神经毒素; 柱层析; 阻遏试验;
D O I
暂无
中图分类号
学科分类号
摘要
本文用SP-SephadexC-25柱层析法分离广西眼镜王蛇蛇毒,得到19个组分,其中7个组分有毒性。对毒性较强,含量较高的4个毒性组分(即神经毒素Ⅴ、Ⅶ、Ⅷ和Ⅹ)用SephadexG-50凝胶过滤法进行纯化,并对神蛇经毒素Ⅶ和Ⅹ用CM-SephadexC-50柱层析法做了进一步纯化。经聚丙烯酰胺凝胶电泳(PAGE)鉴定,这4个神经毒素均为单一条带。用SDS-PAGE法测得神经毒素Ⅴ、Ⅶ、Ⅷ和Ⅹ的分子量分别为7800,6700,8400和8000,并用它们进行了小鸡颈二腹肌神经—肌肉接头传递的阻遏试验,结果表明这4个神经毒素均有阻遏神经—肌肉接头传递的作用,而且阻遇作用基本不可逆,属于突触后神经毒素。
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页码:14 / 18
页数:5
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