例句與造句

1. two pta-mutants have been selected by using suicide substrate after the mini-tn5 transposon insertion mutagenesis of klebsiella pneumoniae m5al . when used in microaerobic fermentation, the amount of acetate produced by the mutants reduced to less than 50 % of the parent strain, and the yields improved whereas the 1, 3-propanediol titers and productivities decreased
   以klebsiellapneumoniaem5al為出發(fā)菌株，用mini-tn5隨機(jī)轉(zhuǎn)座誘變結(jié)合自殺性底物篩選的方法得到了兩株產(chǎn)乙酸途徑pta基因缺失突變株xl-6和xl-11，應(yīng)用到微氧法發(fā)酵中，突變株的乙酸產(chǎn)量為親株的50以下，甘油轉(zhuǎn)化率有所提高，但1，3-丙二醇濃度和生產(chǎn)強(qiáng)度有所下降。
2. It's difficult to find insertion mutagenesis in a sentence. 用insertion mutagenesis造句挺難的