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【单选题】
镰刀形红细胞贫血病患者血红蛋白β-链上第六位的谷氨酸被缬氨酸取代后,将产生哪些变化? 1 在pH7.0电泳时,增加了异常血红蛋白向阳极移动的速度 2 导致异常脱氧血红蛋白的聚合作用 3 增加了异常血红蛋白的溶解度 4 一级结构发生改变A.
① ② ③
B.
① ③
C.
② ④
D.
④
E.
① ② ③ ④
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