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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.

Host species/Isotype: Rabbit/IgG

Species reactivity: Human, Mouse, Rat

Immunogen: KLH conjugated synthetic peptide derived from human CK20.

 Storage instructions: Shipped at 4°C. Upon delivery aliquot and store at -20°C. Avoid freeze / thaw cycles.

Concentration:1mg/ml

Purity: affinity purified by Protein A

Clonality: Polyclonal

Molecular weight: 48KDa

Tested applications:

WB=1:500-2000

ELISA=1:500-1000

IHC-P=1:100-500

IHC-F=1:100-500

IF=1:100-500