Then near these CRISPR locations are Cluster associated or Cas proteins, many of which have enzymatic activity.

这些CRISPR位点附近有基因编码成簇相关蛋白，即Cas蛋白，它们许多都有酶活性。

This work has led to the creation of proteins with new enzymatic activities, able to catalyze useful chemical reactions.

“这项研究创造出具有新型酶活性的蛋白质，这种蛋白质可以催化有益的化学反应。

The use of antibiotics can produce changes in the oral microbiota by destroying many bacterial species and decreasing their enzymatic activity.

使用抗生素会杀死许多种细菌，降低其酶活性，从而改变口腔微生物群。