cytokeratin

例句：

1. 1. The scientist discovered that the keratin layer of the skin is crucial for its elasticity and durability.
   科学家发现，皮肤的角蛋白层对其弹性和耐久性至关重要。
2. 2.The new anti-aging cream contains keratin, which helps to repair damaged skin cells.
   这款新的抗衰老面霜含有角蛋白，有助于修复受损的皮肤细胞。
3. 3.The researcher found that keratin plays a vital role in wound healing and tissue repair.
   研究者发现，角蛋白在伤口愈合和组织修复中起着至关重要的作用。