A photochromic α-amylase was prepared by chemical modification with a spiropyran compound and isolated with DEAE-Sephadex chromatography. The modified α-amylase showed the reverse photochromism in water. UV- or VS-light irradiation caused a decrease in enzyme activity of the modified enzyme. The initial activity could be recovered when the modified enzyme irradiated was kept in the dark.
利用螺
吡喃化合物对
α-淀粉酶进行
化学修饰,制备了一种光致变色的
α-淀粉酶,并利用
DEAE-Sephadex色谱法对其进行了分离。修饰后的
α-淀粉酶在
水中呈现反向光致变色。紫外线或 VS 光照射会导致
修饰酶的酶活性下降。在黑暗中保存照射过的改良酶,其初始活性可以恢复。