contractileprotein

例句：

1. 1. The muscle fibers are made up of contractile proteins that allow them to contract and relax.
   肌肉纤维由收缩蛋白组成，使它们能够收缩和放松。
2. 2. Contractile proteins play a crucial role in the functioning of muscles.
   收缩蛋白在肌肉的功能中起着至关重要的作用。
3. 3.The discovery of these proteins has led to new insights into the mechanisms underlying muscle contraction.
   对这些蛋白质的发现为理解肌肉收缩机制提供了新的见解。