亚洲精品综合日韩中文字幕网站_精品综合久久久久97_中文在线天堂网www_久久精品免费一区二区三区_91久久国产综合精品女同国语_久久资源总站在线国产成人

Cytokeratin 13 （CK13）, also known as keratin 13 （KRT13）, is a type I acidic polymer metamorphine. It forms a heterotetramer with type I CK4 and forms an intermediate wire, mainly to shape the cell skeleton of specific epithelial cells. It is mainly expressed in suprabasal layers of noncornified stratified epithelium, including squamous （nonkeratinized） epithelia of cervix, esophagus, larynx, oral cavity, tonsils, urothelium and respiratory type epithelium. It is a marker of mature but nonkeratinized squamous epithelium.