|Application ||IHC, IF, FC|
|Other Accession||3856, 533782, 708445|
|Isotype||Mouse / IgG1, kappa|
|Other Names||Keratin, type II cytoskeletal 8, Cytokeratin-8, CK-8, Keratin-8, K8, Type-II keratin Kb8, KRT8, CYK8|
|Storage||Store at 2 to 8°C.Antibody is stable for 24 months.|
|Precautions||Cytokeratin 8 (KRT8) Antibody is for research use only and not for use in diagnostic or therapeutic procedures.|
|Function||Together with KRT19, helps to link the contractile apparatus to dystrophin at the costameres of striated muscle.|
|Cellular Location||Cytoplasm. Nucleus, nucleoplasm Nucleus matrix|
|Tissue Location||Observed in muscle fibers accumulating in the costameres of myoplasm at the sarcolemma membrane in structures that contain dystrophin and spectrin. Expressed in gingival mucosa and hard palate of the oral cavity.|
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Cytokeratin 8 (CK8) belongs to the type II (or B or basic) subfamily of high molecular weight cytokeratins and exists in combination with cytokeratin 18 (CK18). CK8 is primarily found in the non-squamous epithelia and is present in majority of adenocarcinomas and ductal carcinomas. It is absent in squamous cell carcinomas. Hepatocellular carcinomas are defined by the use of antibodies that recognize only cytokeratin 8 and 18. CK8 exists on several types of normal and neoplastic epithelia, including many ductal and glandular epithelia such as colon, stomach, small intestine, trachea, and esophagus as well as in transitional epithelium. Anti-CK8 does not react with skeletal muscle or nerve cells. Epithelioid sarcoma, chordoma, and adamantinoma show strong positivity corresponding to that of simple epithelia (with antibodies against CK8, CK18 and CK19). Anti-CK8 is useful for the differentiation of lobular (�ring-like, perinuclear�) from ductal (�peripheral-predominant�) carcinoma of the breast.
Leube, R.E., et al. 1986. Cytokeratin expression in simple epithelia. III. Detection of mRNAs encoding human cytokeratins nos. 8 and 18 in normal and tumor cells by hybridization with cDNA sequences in vitro and in situ. Differentiation 33: 69-85
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