Product nameAnti-Cytokeratin 19 antibody [A53-B/A2]
See all Cytokeratin 19 primary antibodies
DescriptionMouse monoclonal [A53-B/A2] to Cytokeratin 19
SpecificityRod domain of cytokeratin peptide 19 (40 kDa) in human tissue.
Tested applicationsSuitable for: IHC-Fr, ICC/IF, Flow Cyt, WB, IHC-P, ICC, ELISA, IPmore details
Species reactivityReacts with: Human
Human mammary carcinoma cell line MCF-7.
EpitopeRod domain of cytokeratin peptide 19.
- This antibody gave a positive result in IF/ICC when used in the following methanol fixed cell lines: HepG2.
Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
Storage bufferpH: 7.40
Preservative: 0.097% Sodium azide
Concentration information loading...
Purity>95% by SDS-PAGE
Our Abpromise guarantee covers the use of ab7754 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|IHC-Fr||Use at an assay dependent concentration. PubMed: 21339324|
|ICC/IF||Use at an assay dependent concentration.|
|Flow Cyt||Use 0.5µg for 106 cells.
ab170191 - Mouse monoclonal IgG2a, is suitable for use as an isotype control with this antibody.
|WB||Use at an assay dependent concentration.|
|IHC-P||Use at an assay dependent concentration. Perform enzymatic antigen retrieval before commencing with IHC staining protocol.|
|ICC||Use at an assay dependent concentration.|
|ELISA||Use at an assay dependent concentration.|
|IP||Use at an assay dependent concentration.|
FunctionInvolved in the organization of myofibers. Together with KRT8, helps to link the contractile apparatus to dystrophin at the costameres of striated muscle.
Tissue specificityExpressed in a defined zone of basal keratinocytes in the deep outer root sheath of hair follicles. Also observed in sweat gland and mammary gland ductal and secretory cells, bile ducts, gastrointestinal tract, bladder urothelium, oral epithelia, esophagus, ectocervical epithelium (at protein level). Expressed in epidermal basal cells, in nipple epidermis and a defined region of the hair follicle. Also seen in a subset of vascular wall cells in both the veins and artery of human umbilical cord, and in umbilical cord vascular smooth muscle. Observed in muscle fibers accumulating in the costameres of myoplasm at the sarcolemma in structures that contain dystrophin and spectrin.
Sequence similaritiesBelongs to the intermediate filament family.
Developmental stagePresent in hair follicles at all stages of development.
DomainThis keratin differs from all other IF proteins in lacking the C-terminal tail domain.
- Information by UniProt
- 40 kDa keratin intermediate filament antibody
- CK 19 antibody
- CK-19 antibody
ab7754 staining Cytokeratin 19 in human skin.
Left panel: with primary antibody at 2 ug/ml. Right panel: isotype control.
Sections were stained using an automated system (DAKO Autostainer Plus), at room temperature: sections were rehydrated and antigen retrieved with the Dako 3 in 1 AR buffers citrate pH6.1. Slides were peroxidase blocked in 3% H2O2 in methanol for 10 mins. They were then blocked with Dako Protein block for 10 minutes (containing casein 0.25% in PBS) then incubated with primary antibody for 20 min and detected with Dako envision flex amplification kit for 30 minutes. Colorimetric detection was completed with Diaminobenzidine for 5 minutes. Slides were counterstained with Haematoxylin and coverslipped under DePeX. Please note that for manual staining we recommend to optimize the primary antibody concentration and incubation time (overnight incubation), and amplification may be required.
All lanes : Anti-Cytokeratin 19 antibody [A53-B/A2] (ab7754) at 1/1000 dilution
Lane 1 : Lung tumour lysate (patient 1)
Lane 2 : Lung tumour lysate (patient 2)
Lane 3 : Lung tumour lysate (patient 3)
Lane 4 : Lung tumour lysate (patient 4)
Lysates/proteins at 5 µg per lane.
All lanes : Goat anti mouse HRP (H and L) at 1/40000 dilution
Performed under reducing conditions.
Observed band size: 44 kDa why is the actual band size different from the predicted?
Additional bands at: 150 kDa. We are unsure as to the identity of these extra bands.
Blocking conditions: 5% milk 1hr at room temperature.
This image is an edited version of an image submitted courtesy of an Abreview by Mike Campa submitted on 19th October 2005. We do not have any further information relating to this image.
Overlay histogram showing MCF7 cells stained with ab7754 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab7754, 0.5µg/1x106 cells) for 30 min at 22ºC. The secondary antibody used was DyLight® 488 goat anti-mouse IgG (H+L) (ab96879) at 1/500 dilution for 30 min at 22ºC. Isotype control antibody (black line) was mouse IgG2a [ICIGG2A] (ab91361, 1µg/1x106 cells) used under the same conditions. Acquisition of >5,000 events was performed.
Immunohistochemical analysis of formaldehyde fixed human liver tissue sections labeling Cytokeratin 19 with ab7754 at 1/200 dilution,followed by Goat Anti-Mouse IgG (Alexa Fluor® 488) at 1/500 dilution.
ICC/IF image of ab7754 stained HepG2 cells. The cells were 100% methanol fixed (5 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody ab7754 at 5µg/ml overnight at +4°C. The secondary antibody (green) was DyLight® 488 goat anti- mouse (ab96879) IgG (H+L) used at a 1/1000 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.
ab7754 staining Cytokeratin 19 in Human liver tissue sections by Immunohistochemistry (IHC-P - formaldehyde-fixed, paraffin-embedded sections). Tissue was fixed with formaldehyde and blocked with 5% milk for 30 minutes at 37°C; antigen retrieval was by heat mediation in citrate buffer. Samples were incubated with primary antibody (1/1000 in antibody diluent) for 1 hour at 37°C. An undiluted HRP-conjugated goat anti-rabbit IgG polyclonal was used as the secondary antibody.
Immunofluorescence analysis of 1 month hepato-differentiated Human dental pulp stem cells, staining Cytokeratin 19 with ab7754 at 1/60 dilution. A FITC-conjugated anti-mouse IgG was used as the secondary antibody.
This product has been referenced in:
- Saito Y et al. Induction of differentiation of intrahepatic cholangiocarcinoma cells to functional hepatocytes using an organoid culture system. Sci Rep 8:2821 (2018). Read more (PubMed: 29434290) »
- Jokela TA et al. Microenvironment-Induced Non-sporadic Expression of the AXL and cKIT Receptors Are Related to Epithelial Plasticity and Drug Resistance. Front Cell Dev Biol 6:41 (2018). Read more (PubMed: 29719832) »