目的克隆并表达大肠杆菌色氨酸操纵子基因，提高其酶活性。
Objective To clone and express the Tip operon gene of E. coli and increase the enzyme activity of expressed product.
含有编码色氨酸合成酶基因的操纵子。
Operon containing genes coding for the synthesis of tryptophan.
含有编码色氨酸合成酶基因的操纵子。
Operon containing genes coding for the synthesis of tryptophan.
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