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麻疯树苯丙氨酸解氨酶启动子的克隆和表达载体的构建 Export

植物研究, Vol. 27, No. 4. (2007), pp. 455-459.

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苯丙氨酸解氨酶(phenylalanine ammonia lyase,PAL)是苯丙烷类代谢途径的关键酶,催化苯丙氨酸转化为肉桂酸,促进黄酮、香豆素等次生代谢物的生成。本文根据已克隆的麻疯树苯丙氨酸解氨酶基因JcPAL的序列设计引物,通过DNA步移技术,克隆出长度为1334bp的JcPAL基因起始密码子上游序列。序列分析显示其不仅具备CAAT、 TATA盒这些保守元件,而且包含多种胁迫诱导元件,特别是在序列中发现一些苯丙氨酸解氨酶特有的元件。为了鉴定JcPAL基因的启动子元件,分别将长度不同的5′端侧翼区缺失体定向插入载体pBI121中,取代原有的CaMV35S启动子,构建了4个驱动报告基因GUS的植物表达载体。


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