site directed mutagenesis

例句：

1. 1.Site-directed mutagenesis is a powerful tool for genetic engineering.
   定点突变技术是遗传工程的强大工具。
2. 2. This technique allows us to introduce mutations at specific sites in the genome.
   这项技术使我们能够在基因组的特定位置引入突变。
3. 3.By using site-directed mutagenesis, scientists can study the effects of mutations on protein function.
   通过使用定点突变技术，科学家可以研究突变对蛋白质功能的影响。