regulatory protein的用法和样例：
例句
- CKI plays a negative regulatory role by inhibiting the activity of cyclin-CDK.
细胞周期调节蛋白在细胞周期中的表达和作用已成为当今研究的热门话题。 - By interplaying each other, the two regulatory groups control the initiation, phase transitions, exit and termination of the cell-cycle.
本文将在简述细胞周期之后，就细胞周期调节蛋白的分子生物学研究进展进行综述。
