04-586 | Anti-Cytokeratin 18 Antibody, rabbit monoclonal, clone E431-1

100 µL  
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      Replacement Information

      Key Spec Table

      Species ReactivityKey ApplicationsHostFormatAntibody Type
      H, M, RWB, ICC, IH(P), FCRbPurifiedMonoclonal Antibody
      Catalogue Number04-586
      Brand Family Upstate
      Trade Name
      • Upstate
      DescriptionAnti-Cytokeratin 18 Antibody, rabbit monoclonal, clone E431-1
      Background InformationKeratin polypeptides 8 and 18 (K8/18) are intermediate filament phosphoglycoproteins that are expressed preferentially in glandular epithelia. Cytokeratins play a critical role in differentiation and tissue specialization and function to maintain the overall structural integrity of epithelial cells (1-3). Together with actin microfilaments and microtubules, keratin filaments make up the cytoskeletons of vertebrate epithelial cells, forming alpha-helical coiled-coil dimers which associate laterally and end-to-end to form 10-nm diameter filaments (4).
      Product Information
      • Positive control: A431 cell lysate.
      PresentationBuffer: 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
      ApplicationPlease note that this product will not be available for sale after March 15, 2015. Please select one of the other antibodies against this target. This Anti-Cytokeratin 18 Antibody, Rabbit, clone E431-1 is validated for use in WB, IC, IH(P), FC for the detection of Cytokeratin 18.
      Key Applications
      • Western Blotting
      • Immunocytochemistry
      • Immunohistochemistry (Paraffin)
      • Flow Cytometry
      Application NotesWestern Blot: 1:10,000
      Immunohistochemistry: 1:100-1:250 (Paraffin-embedded colon carcinoma)
      Immunocytochemistry: 1:100
      Flow Cytometry: 1:20

      Optimal working dilutions must be determined by the end user.
      Biological Information
      ImmunogenA synthetic peptide corresponding to residues of human Cytokeratin 18.
      SpecificityRecognizes Human, Mouse, Rat Cytokeratin 18.
      Species Reactivity
      • Human
      • Mouse
      • Rat
      Antibody TypeMonoclonal Antibody
      Entrez Gene Number
      Entrez Gene SummaryKRT18 encodes the type I intermediate filament chain keratin 18. Keratin 18, together with its filament partner keratin 8, are perhaps the most commonly found members of the intermediate filament gene family. They are expressed in single layer epithelial tissues of the body. Mutations in this gene have been linked to cryptogenic cirrhosis. Two transcript variants encoding the same protein have been found for this gene.
      Gene Symbol
      • KRT18
      • K18
      • CYK18
      • Keratin-18
      • Cytokeratin-18
      • CK-18
      Purification MethodProtein A Purfied
      UniProt Number
      UniProt SummaryFUNCTION: SwissProt: P05783 # Involved in the uptake of thrombin-antithrombin complexes by hepatic cells (By similarity). When phosphorylated, plays a role in filament reorganization. Involved in the delivery of mutated CFTR to the plasma membrane. Together with KRT8, is involved in interleukin-6 (IL-6)-mediated barrier protection.
      SIZE: 430 amino acids; 48058 Da
      SUBUNIT: Heterotetramer of two type I and two type II keratins. Keratin-18 associates with keratin-8. Interacts with the thrombin- antithrombin complex (By similarity). Interacts with PNN, HCV core protein and mutated CFTR. Interacts with YWHAE, YWHAH and YWHAZ only when phosphorylated. Interacts with DNAJB6, TCHP and TRADD.
      SUBCELLULAR LOCATION: Cytoplasm, perinuclear region.
      TISSUE SPECIFICITY: Expressed in colon, placenta, liver and very weakly in exocervix. Increased expression observed in lymph nodes of breast carcinoma.
      PTM: Phosphorylation at Ser-34 increases during mitosis. Hyperphosphorylated at Ser-53 in diseased cirrhosis liver. Phosphorylation increases by IL-6. & Proteolytically cleaved by caspases during epithelial cell apoptosis. Cleavage occurs at Asp-238 by either caspase-3, caspase-6 or caspase-7.DISEASE:SwissProt: P05783 # Defects in KRT18 are a cause of cryptogenic cirrhosis [MIM:215600].
      SIMILARITY: SwissProt: P05783 ## Belongs to the intermediate filament family.
      MISCELLANEOUS: There are two types of cytoskeletal and microfibrillar keratin: I (acidic; 40-55 kDa) and II (neutral to basic; 56-70 kDa).
      Physicochemical Information
      Materials Information
      Toxicological Information
      Safety Information according to GHS
      Safety Information
      Product Usage Statements
      Usage Statement
      • Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
      Storage and Shipping Information
      Storage ConditionsStore at -20 °C. Stable for 12 months from date of receipt.
      Packaging Information
      Material Size100 µL
      Transport Information
      Supplemental Information




      Safety Data Sheet (SDS) 

      Certificates of Analysis

      TitleLot Number
      Anti-Cytokeratin 18, clone E431-1 2478013
      Anti-Cytokeratin 18, clone E431-1 (Rabbit monoclonal) - 2367286 2367286
      Anti-Cytokeratin 18, clone E431-1 (Rabbit monoclonal) - 1996239 1996239
      Anti-Cytokeratin 18, clone E431-1 (Rabbit monoclonal) - 2070418 2070418
      Anti-Cytokeratin 18, clone E431-1 (Rabbit monoclonal) - 2239609 2239609
      Anti-Cytokeratin 18, clone E431-1 (Rabbit monoclonal) - DAM1446408 DAM1446408
      Anti-Cytokeratin 18, clone E431-1 (Rabbit monoclonal) -2504879 2504879
      Anti-Cytokeratin 18, clone E431-1 - 2426981 2426981
      Anti-Cytokeratin 18, clone E431-1 - 2051894 2051894
      Anti-Cytokeratin 18, clone E431-1 - DAM1407382 DAM1407382


      Reference overviewPub Med ID
      Altered detrusor gap junction communications induce storage symptoms in bladder inflammation: a mouse cyclophosphamide-induced model of cystitis.
      Okinami, T; Imamura, M; Nishikawa, N; Negoro, H; Sugino, Y; Yoshimura, K; Kanematsu, A; Hashitani, H; Ogawa, O
      PloS one  9  e104216  2014

      Show Abstract
      25099633 25099633
      Role of SH2-containing tyrosine phosphatase Shp2 in mouse corneal epithelial stratification.
      Ng, GY; Yeh, LK; Zhang, Y; Liu, H; Feng, GS; Kao, WW; Liu, CY
      Investigative ophthalmology & visual science  54  7933-42  2013

      Show Abstract
      24204042 24204042
      Keratins and the skin.
      Fuchs, E
      Annu. Rev. Cell Dev. Biol., 11: 123-53 (1995)  1995

      Show Abstract
      8689554 8689554
      Identification and mutational analysis of the glycosylation sites of human keratin 18
      Ku, N O and Omary, M B
      J Biol Chem, 270:11820-7 (1995)  1995

      7538124 7538124
      Cytokeratin expression, fibrillar organization, and subtle function in liver cells
      Marceau, N and Loranger, A
      Biochem Cell Biol, 73:619-25 ()  1995

      8714681 8714681
      Cloning of the human keratin 18 gene and its expression in nonepithelial mouse cells
      Kulesh, D A and Oshima, R G
      Mol Cell Biol, 8:1540-50 (1988)  1988

      2454392 2454392

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      Life Science Research > Antibodies and Assays > Primary Antibodies