结论：可通过四环素抗性筛选系统筛选外源基因的高效表达克隆。
Conclussion: We could screen high expressed clone of heterologous gene using tetracycline resistance screening system.
菌株as1.2352对氨苄青霉素具有抗性，对四环素和卡那霉素不具有抗性。
The strain AS1.2352 is resistant to ampicillin, and sensitive to tetracycline and kanamycin.
菌株as1.2352对氨苄青霉素具有抗性，对四环素和卡那霉素不具有抗性。
The strain AS1.2352 is resistant to ampicillin, and sensitive to tetracycline and kanamycin.
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