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蛋白质盐析的原理是()

单选题
2022-06-21 15:35
A、氨基酸序列改变
B、肽键断裂
C、空间构象破坏
D、水化膜破坏
E、水解
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正确答案
D

试题解析
蛋白质变性是在某些物理和化学因素作用下,其特定的空间构象被破坏,从而导致其理化性质的改变和生物活性的丧失;在蛋白质溶液中加入大量的硫酸铵、硫酸钠或氯化钠等中性盐,可破坏蛋白质的水化膜和同种电荷,使蛋白质颗粒相互聚集,发生沉淀。

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