以下为句子列表：
英文: Chorismate mutase (CM ), prephenate dehydratase (PD ), and phenylalanine aminotransferase (PAT) are the three key enzymes in the fermentation of phenylalanine. In E. colt,the first two are encoded by a single gene pheA,while the third by tyrB gene.
中文: 为探讨用基因工程的手段改良苯丙氨酸的发酵菌株，采用聚合酶链反应（PCR）的方法，从大肠杆菌总DNA中克隆得到了编码苯丙氨酸合成途中的两个关键酶基因－－即分枝酸变位酶（CM）／预苯酸脱水酶（PD）基因pheA与苯丙氨酸转氨酶（PAT）基因tyrB，在大肠杆菌中进行了这两个基因的单个和串联表达。
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英文: THE DEVELOPMENT OF SULFURIZED CALCIUM ALKYL PHENATE WITH HIGH BASE NUMBER
中文: 高碱值硫化烷基酚钙的研制
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英文: The anti-thermo-oxidative property of CNR from latex could be increased greatly by adding a little antioxidant. The best systems are 0.%/0.%(in mass) AOI/AOIII (phenate antioxidant / phosphite antioxidant); 0.%(in mass) AOI (phenate antioxidant).
中文: 最佳配方为0 %/0 %(质量百分比)AOI(酚类抗氧剂)与AOIII(亚磷酸酯类抗氧剂)并用,或加入0 %(质量百分比)的AOI。
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