Cytokeratin 20 (KRT20) Mouse Monoclonal Antibody [Clone ID: KS20.3]

Specifications

Product Data
Clone Name	KS20.3
Applications	IHC, WB
Recommend Dilution	Immunohistochemistry on frozen sections: 1:10. Western Blot. Incubation Time: 1 h at RT or over night at 2-8°C.
Reactivity	Human, Porcine
Host	Mouse
Clonality	Monoclonal
Immunogen	Electrophoretically purified keratin K20 from human intestinal mucosa.
Specificity	IT-Ks 20.3 represents an excellent marker for certain types of carcinomas such as adenocarcinomas of the colon, transitional cell carcinomas of the bladder and Merkel cell tumors of the skin. Very sensitive detection of intestestinal and gastric foveolar epithelium, urothelial umbrella cells, Merkel cells of epidermis as well as tumors originating therefrom (e.g. primary and metastatic colorectal carcinoma). Adenocarcinomas of breast, lung, endometrium and ovary (non-mucinous) as well as neuroendocrine tumors of the lung are essentially negative. Polypeptide recognized: protein IT (keratin K20; Mr 46 000; formerly also designated cytokeratin 20).
Formulation	Contains 0.09 % sodium azide, 0.5% BSA in PBS buffer, pH 7.4 State: Purified State: Lyophilized purified IgG
Reconstitution Method	Restore in 1 ml dist. water
Purification	Protein A affinity chromatography
Conjugation	Unconjugated
Storage Condition	Stable for one year after reconstitution when stored at 2-8°C. For extended storage keep in aliquots at -20°C. Avoid repeated freezing and thawing.
Gene Name	keratin 20
Database Link	Entrez Gene 54474 Human UniProt ID P35900
Background	Cytokeratin 20 is a type I keratin which is primarily expressed in gastric and intestinal epithelium, urothelium, and Merkel-cells. The keratins are intermediate filament proteins responsible for the structural integrity of epithelial cells and are subdivided into cytokeratins and hair keratins. The type I cytokeratins consist of acidic proteins which are arranged in pairs of heterotypic keratin chains. Their genes are clustered in a region of chromosome 17q12-q21. Cytokeratin 20 is a major cellular protein of mature enterocytes and goblet cells and is specifically expressed in the gastric and intestinal mucosa. It is also expressed in adenocarcinomas of the colon, stomach, pancreas and the bile system and is present in mucinous ovarian tumors, transitional-cell and Merkel-cell carcinomas. Notably, the squamous cell carcinomas and adenocarcinomas of the breast, lung, and endometrium, non-mucinous tumors of the ovary, and small cell carcinomas lack cytokeratin 20.
Synonyms	Cytokeratin 20, Keratin-20, KRT20, CK20, K20, Protein IT
Reference Data

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