题目内容

41．镰刀型红细胞性贫血是由于 HbA 的结构变化引起的，其变化的特点是

A. HbA 的 α 链的 N-末端第六位谷氨酸残基被缬氨酸所取代
B. HbA 的 α 链的 C-末端第六位谷氨酸残基被缬氨酸所取代
C. HbA 的 β 链的 N-末端第六位谷氨酸残基被缬氨酸所取代
D. HbA 的 β 链的 C-末端第六位谷氨酸残基被缬氨酸所取代
E. 以上都不是

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