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AB236435

Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free

5

(1 Review)

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(1 Publication)

Rabbit Recombinant Monoclonal Cytokeratin 20 antibody. Carrier free. Suitable for IHC-P, Flow Cyt, ICC/IF, IHC-Fr and reacts with Human, Rat samples. Cited in 1 publication.

View Alternative Names

Cytokeratin-20, Keratin-20, Protein IT, CK-20, K20, KRT20

6 Images
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of Human colon carcinoma tissue sections labeling Cytokeratin 20 with ab64090 at 1/100 dilution (17.9 μg/ml). Heat mediated antigen retrieval with Tris-EDTA buffer (pH 6.0, epitope retrieval solution 1) for 10mins. Rabbit specific IHC polymer detection kit HRP/DAB (ab209101) was used as the secondary antibody. Hematoxylin was used as a counterstain. Positive staining on human colon carcinoma, performed on a Leica Biosystems BOND™ RX instrument.
The section was incubated with ab64090 for 30 mins at room temperature. This image was generated using ab64090, the same clone, but with a different buffer formulation.

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)
  • ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)

Immunocytochemistry/ Immunofluorescence analysis of HT-29 (human colorectal adenocarcinoma epithelial cell) cells labeling Cytokeratin 20 with purified ab64090 at 1/500 (3.58 μg/ml). Cells were fixed in 4% paraformaldehyde and permeabilized with 0.1% Triton X-100. Cells were counterstained with ab195889 Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker (Alexa Fluor® 594) 1/200 (2.5 μg/ml). Goat anti rabbit IgG (Alexa Fluor® 488, ab150077) was used as the secondary antibody at 1/1000 (2 μg/ml) dilution. DAPI was used as nuclear counterstain. PBS instead of the primary antibody was used as the secondary antibody only control.
This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab64090).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)
  • IHC-P

Supplier Data

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)

Formalin-fixed, paraffin-embedded human colon carcinoma tissue stained for Cytokeratin 20 with ab64090 at a 1/100 dilution in immunohistochemical analysis.

This data was developed using the same antibody clone in a different buffer formulation containing PBS and sodium azide (ab64090).

Flow Cytometry - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)
  • Flow Cyt

Unknown

Flow Cytometry - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)

Flow cytometry analysis of HT-29 (human colorectal adenocarcinoma) labeling Cytokeratin 20 with purified ab64090 at 1/1700 dilution (1.05 μg/ml) (red). Cells were fixed with 4% paraformaldehyde and permeabilised with 90% methanol. Goat anti rabbit IgG (Alexa Fluor® 488, ab150077) at 1/2000 dilution was used as a secondary antibody. Isotypecontrol - Rabbit monoclonal IgG (ab172730) (black). Unlableled control - Unlabelled cells (blue).
This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab64090).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of Rat colon tissue sections labeling Cytokeratin 20 with ab64090 at 1/100 dilution (17.9 μg/ml). Heat mediated antigen retrieval with Tris-EDTA buffer (pH 6.0, epitope retrieval solution 1) for 10mins. Rabbit specific IHC polymer detection kit HRP/DAB (ab209101) was used as the secondary antibody. Hematoxylin was used as a counterstain. Positive staining on rat colon, performed on a Leica Biosystems BOND™ RX instrument.
The section was incubated with ab64090 for 30 mins at room temperature. This image was generated using ab64090, the same clone, but with a different buffer formulation.

Immunohistochemistry (Frozen sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)
  • IHC-Fr

Unknown

Immunohistochemistry (Frozen sections) - Anti-Cytokeratin 20 antibody [SP33] - BSA and Azide free (AB236435)

Immunohistochemistry (Frozen) analysis of rat colon tissue section labeling Cytokeratin 20 with purified ab64090 at 1/1000 (1.8 μg/ml). Sections were fixed in 4% paraformaldehyde and permeabilized with 0.2% Triton X-100. Antigen retrieval was heat mediated antigen retrieval using sodium citrate buffer (10mM citrate pH 6.0 + 0.05% Tween-20). Goat anti rabbit IgG (Alexa Fluor® 488, ab150077) was used as the secondary antibody at 1/1000 (2 μg/ml) dilution. DAPI was used as nuclear counterstain. PBS instead of the primary antibody was used as the secondary antibody only control.
This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab64090).

  • Unconjugated

    Anti-Cytokeratin 20 antibody [SP33]

  • Unconjugated

    Anti-Cytokeratin 20 antibody [SP33], prediluted

  • 660 APC

    APC Anti-Cytokeratin 20 antibody [SP33]

  • 519 Alexa Fluor® 488

    Alexa Fluor® 488 Anti-Cytokeratin 20 antibody [SP33]

  • 565 Alexa Fluor® 555

    Alexa Fluor® 555 Anti-Cytokeratin 20 antibody [SP33]

  • 617 Alexa Fluor® 594

    Alexa Fluor® 594 Anti-Cytokeratin 20 antibody [SP33]

  • 665 Alexa Fluor® 647

    Alexa Fluor® 647 Anti-Cytokeratin 20 antibody [SP33]

  • 775 Alexa Fluor® 750

    Alexa Fluor® 750 Anti-Cytokeratin 20 antibody [SP33]

  • 578 PE

    PE Anti-Cytokeratin 20 antibody [SP33]

Key facts

Host species

Rabbit

Clonality

Monoclonal

Clone number

SP33

Isotype

IgG

Carrier free

Yes

Reacts with

Rat, Human

Applications

Flow Cyt, ICC/IF, IHC-P, IHC-Fr

applications

Immunogen

The exact immunogen used to generate this antibody is proprietary information.

Reactivity data

{ "title": "Reactivity Data", "filters": { "stats": ["", "Species", "Dilution Info", "Notes"], "tabs": { "all-applications": {"fullname" : "All Applications", "shortname": "All Applications"}, "IHCP" : {"fullname" : "Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)", "shortname":"IHC-P"}, "FlowCyt" : {"fullname" : "Flow Cytometry", "shortname":"Flow Cyt"}, "ICCIF" : {"fullname" : "Immunocytochemistry/ Immunofluorescence", "shortname":"ICC/IF"}, "IHCFr" : {"fullname" : "Immunohistochemistry (Frozen sections)", "shortname":"IHC-Fr"} }, "product-promise": { "all": "all", "testedAndGuaranteed": "tested", "guaranteed": "expected", "predicted": "predicted", "notRecommended": "not-recommended" } }, "values": { "Human": { "IHCP-species-checked": "testedAndGuaranteed", "IHCP-species-dilution-info": "", "IHCP-species-notes": "<p></p>", "FlowCyt-species-checked": "testedAndGuaranteed", "FlowCyt-species-dilution-info": "", "FlowCyt-species-notes": "<p></p>", "ICCIF-species-checked": "testedAndGuaranteed", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "<p></p>", "IHCFr-species-checked": "guaranteed", "IHCFr-species-dilution-info": "", "IHCFr-species-notes": "" }, "Mouse": { "IHCP-species-checked": "predicted", "IHCP-species-dilution-info": "", "IHCP-species-notes": "", "FlowCyt-species-checked": "predicted", "FlowCyt-species-dilution-info": "", "FlowCyt-species-notes": "", "ICCIF-species-checked": "predicted", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCFr-species-checked": "predicted", "IHCFr-species-dilution-info": "", "IHCFr-species-notes": "" }, "Rat": { "IHCP-species-checked": "testedAndGuaranteed", "IHCP-species-dilution-info": "", "IHCP-species-notes": "<p></p>", "FlowCyt-species-checked": "guaranteed", "FlowCyt-species-dilution-info": "", "FlowCyt-species-notes": "", "ICCIF-species-checked": "guaranteed", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCFr-species-checked": "testedAndGuaranteed", "IHCFr-species-dilution-info": "", "IHCFr-species-notes": "<p></p>" }, "Cow": { "IHCP-species-checked": "predicted", "IHCP-species-dilution-info": "", "IHCP-species-notes": "", "FlowCyt-species-checked": "predicted", "FlowCyt-species-dilution-info": "", "FlowCyt-species-notes": "", "ICCIF-species-checked": "predicted", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCFr-species-checked": "predicted", "IHCFr-species-dilution-info": "", "IHCFr-species-notes": "" }, "Dog": { "IHCP-species-checked": "predicted", "IHCP-species-dilution-info": "", "IHCP-species-notes": "", "FlowCyt-species-checked": "predicted", "FlowCyt-species-dilution-info": "", "FlowCyt-species-notes": "", "ICCIF-species-checked": "predicted", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCFr-species-checked": "predicted", "IHCFr-species-dilution-info": "", "IHCFr-species-notes": "" } } }

Product details

ab236435 is the carrier-free version of ab64090.

What are the advantages of a recombinant monoclonal antibody?
This product is a recombinant monoclonal antibody, which offers several advantages including:

  • - High batch-to-batch consistency and reproducibility
  • - Improved sensitivity and specificity
  • - Long-term security of supply
  • - Animal-free batch production

For more information, read more on recombinant antibodies.

Conjugation ready
Our carrier-free antibodies are typically supplied in a PBS-only formulation, purified and free of BSA, sodium azide and glycerol. This conjugation-ready format is designed for use with fluorochromes, metal isotopes, oligonucleotides, and enzymes, which makes them ideal for antibody labelling, functional and cell-based assays, flow-based assays (e.g. mass cytometry) and Multiplex Imaging applications.

Use our conjugation kits for antibody conjugates that are ready-to-use in as little as 20 minutes with 1 minute hands-on-time and 100% antibody recovery: available for fluorescent dyes, HRP, biotin and gold.

Compatibility
This product is compatible with the Maxpar® Antibody Labeling Kit from Fluidigm, without the need for antibody preparation. Maxpar® is a trademark of Fluidigm Canada Inc.

Properties and storage information

Form
Liquid
Purification technique
Affinity purification Protein A/G
Purification notes
Purified from TCS by protein A/G.
Storage buffer
pH: 7.2 - 7.4 Constituents: PBS
Shipped at conditions
Blue Ice
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
+4°C
Storage information
Do Not Freeze

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Cytokeratin 20 often known as CK20 KRT20 or keratin 20 is a type of intermediate filament protein that is highly specific to epithelial cells. This cytoskeletal protein has a molecular weight of approximately 46.5 kDa. Cytokeratin 20 is primarily found in the gastric and intestinal epithelium urothelium and Merkel cells. Its function as part of the cytoskeleton provides structural integrity and strength to cells maintaining their shape and resilience against mechanical stress.
Biological function summary

Cytokeratin 20 is essential in cellular differentiation and maintenance within epithelial tissues. It plays an important role in the structural framework of epithelial cells by integrating into the cytoskeletal network which includes other keratins. Typically cytokeratin 20 forms heterodimers with keratin 8 contributing to the assembly of intermediate filaments. These interactions maintain cell stability and are involved in cellular processes such as migration and proliferation.

Pathways

Cytokeratin 20 participates in the framework of intermediate filament signaling influencing cell motility and secretion in epithelial tissues. It contributes mainly to the keratinization pathway which is critical in forming a protective barrier in epithelial cells. Additionally it is related to cell adhesion and signalling pathways that are important for tissue integrity. Connections with keratin 8 and other cytoskeletal proteins facilitate signal transduction processes necessary for epithelial homeostasis and response to injury.

Cytokeratin 20 serves as a valuable marker for identifying specific cancer types particularly colorectal adenocarcinomas and Merkel cell carcinoma. The presence of cytokeratin 20 is often used in immunohistochemistry for cancer diagnosis and prognosis. Its expression pattern is notably distinct helping differentiate between various adenocarcinomas. In colorectal cancer it shows a unique interaction with proteins like keratin 8 supporting the tumor's structural environment and influencing tumorigenesis and metastasis processes.

Product protocols

For this product, it's our understanding that no specific protocols are required. You can visit:

Target data

Plays a significant role in maintaining keratin filament organization in intestinal epithelia. When phosphorylated, plays a role in the secretion of mucin in the small intestine (By similarity).
See full target information KRT20

Publications (1)

Recent publications for all applications. Explore the full list and refine your search

Cancer immunology, immunotherapy : CII 74:107 PubMed39932546

2025

Distinct maturity and spatial distribution of tertiary lymphoid structures in head and neck squamous cell carcinoma: implications for tumor immunity and clinical outcomes.

Applications

Unspecified application

Species

Unspecified reactive species

Shuai Xu,Chao Han,Jian Zhou,Di Yang,Hui Dong,Yiwei Zhang,Tingting Zhao,Yi Tian,Yuzhang Wu
View all publications

Product promise

We are committed to supporting your work with high-quality reagents, and we're here for you every step of the way. In the unlikely event that one of our products does not perform as expected, you're protected by our Product Promise.
For full details, please see our Terms & Conditions

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