Keratins are the intermediate filament proteins specifically expressed by epithelial cells, which is important for differentiation and installation of epidermis.

• 角蛋白是角质形成细胞的主要结构蛋白，是构成细胞骨架中间丝的主要家族之一，在维持表皮结构和表皮分化中具有重要作用。