JavaScript is disabled in your browser. Please enable JavaScript to view this website.
AB198380

Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free

  • BOND RX™ Validated
  • RabMAb
  • Advanced Validation
  • Recombinant
  • What is this?

Be the first to review this product! Submit a review

|

(1 Publication)

Rabbit Recombinant Monoclonal Cytokeratin 18 antibody. Carrier free. Suitable for mIHC, IHC-P, Flow Cyt (Intra), WB, ICC/IF and reacts with Human samples. Cited in 1 publication.

View Alternative Names

CYK18, PIG46, KRT18, Cell proliferation-inducing gene 46 protein, Cytokeratin-18, Keratin-18, CK-18, K18

10 Images
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

ab93741 at 1/200 dilution staining Cytokeratin 18 in formalin-fixed, paraffin-embedded human breast carcinoma tissue.

This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA and sodium azide (ab93741).

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • Flow Cyt (Intra)

Unknown

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

Flow cytometric analysis of rabbit anti-Cytokeratin 18 (SP69) antibody ab93741(1/100) in HeLa (Human epithelial cell line from cervix adenocarcinoma) cells (green) compared to negative control of rabbit IgG (blue).

This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA and sodium azide (ab93741).

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • Flow Cyt (Intra)

Unknown

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

Flow Cytometry analysis of HeLa (human cervix adenocarcinoma epithelial cell) cells labeling Cytokeratin 18 with purified ab93741 at 1 : 240 dilution (1.00 µg/ml) Red. Cells were fixed with 4% paraformaldehyde . A Goat anti rabbit IgG (Alexa Fluor® 488, ab150077) secondary antibody was used at 1 : 2000 dilution. Isotype control - Rabbit monoclonal IgG (ab172730) / Black. Unlabeled 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 (ab135384).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of Human endometrium tissue sections labeling Cytokeratin 18 with ab93741 at 1/200 dilution (1.21 µg/ml). Heat mediated antigen retrieval was performed Heat mediated antigen retrieval with sodium citrate buffer (pH 6.0, epitope retrieval solution 1) for 10 mins. Rabbit specific IHC polymer detection kit HRP/DAB (ab209101) was used as the secondary antibody. Negative control : PBS instead of the primary antibody. Hematoxylin was used as a counterstain.
This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab93741)

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

Immunihistochemical staining of human stomach with ab93741.

This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA and sodium azide (ab93741).

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

ICC/IF image of ab93741 stained HCT116 cells.

The cells were 4% formaldehyde fixed (10 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilize the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody ab93741 at 1/500 dilution overnight at +4°C. The secondary antibody (green) was DyLight® 488 Goat anti-Rabbit IgG (H+L) used at a 1/250 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.

This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA and sodium azide (ab93741).

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

Immunocytochemistry/ Immunofluorescence analysis of HeLa (human cervix adenocarcinoma epithelial cell) cells labeling Cytokeratin 18 with purified ab93741 at 1 : 100(2.4 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 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 (ab135384).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of Human stomach tissue sections labeling Cytokeratin 18 with ab93741 at 1/200 dilution (1.21 µg/ml). Heat mediated antigen retrieval was performed Heat mediated antigen retrieval with sodium citrate buffer (pH 6.0, epitope retrieval solution 1) for 10 mins. Rabbit specific IHC polymer detection kit HRP/DAB (ab209101) was used as the secondary antibody. Negative control : PBS instead of the primary antibody. Hematoxylin was used as a counterstain.
This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab93741)

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • Flow Cyt (Intra)

Unknown

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

Overlay histogram showing MCF7 (Human breast adenocarcinoma cell line) cells stained with ab93741 (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 (ab93741 1/1000 dilution) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-rabbit IgG (H&L) (ab150077) at 1/2000 dilution for 30 min at 22°C. Isotype control antibody (black line) was rabbit IgG (monoclonal) (0.1μg/1x106 cells) used under the same conditions. Unlabeled sample (blue line) was also used as a control.

Acquisition of >5000 events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter.

This antibody gave a positive signal in MCF7 cells fixed with 4% paraformaldehyde (10 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.

This data was developed using the same antibody clone in a different buffer formulation containing PBS BSA and sodium azide (ab93741).

Multiplex immunohistochemistry - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)
  • mIHC

Lab

Multiplex immunohistochemistry - Anti-Cytokeratin 18 antibody [SP69] - BSA and Azide free (AB198380)

This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab135384). Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of Human breast labelling Cytokeratin 18 with ab93741 at 1/200 dilution (1.02 µg/mL) (B), Collagen VI with ab271938 at 1/500 dilution (2.084 μg/ml) (C) and Cytokeratin 14 with ab236439 at 1/2000 dilution ( 0.519 μg/ml) (D). Opal Polymer HRP Ms + Rb was used as a secondary antibody, and DAPI was used for a nuclear counter stain. Heat mediated antigen retrieval with Citrate buffer (pH 6.0, epitope retrieval solution 1) for 20 mins. Panel A : merged staining of anti-Cytokeratin 14 (magenta; Opal™690), anti-Cytokeratin 18 (green; Opal™520) and anti-Collagen VI (red; Opal™570) on human breast. Panel B : anti-Cytokeratin 18 stained on luminal epithelial cells. Panel C : anti-Collagen VI stained on stroma. Panel D : anti-Cytokeratin 14 stained on myoepithelial cells. The section was incubated in three rounds of staining : in the order of ab236439 for 30 mins, ab93741 for 10 mins, and ab271938 for 30 mins at room temperature. Each round was followed by a separate fluorescent tyramide signal amplification system. The immunostaining was performed on a Leica Biosystems BOND® RX instrument with an Opal™ 4-color kit. Image acquisition was performed with Leica SP8 confocal microscope.

  • Unconjugated

    Anti-Cytokeratin 18 antibody [SP69]

  • Biotin

    Biotin Anti-Cytokeratin 18 antibody [SP69]

Key facts

Host species

Rabbit

Clonality

Monoclonal

Clone number

SP69

Isotype

IgG

Carrier free

Yes

Reacts with

Human

Applications

WB, Flow Cyt (Intra), IHC-P, mIHC, ICC/IF

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"}, "mIHC" : {"fullname" : "Multiplex immunohistochemistry", "shortname":"mIHC"}, "IHCP" : {"fullname" : "Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)", "shortname":"IHC-P"}, "FlowCytIntra" : {"fullname" : "Flow Cytometry (Intracellular)", "shortname":"Flow Cyt (Intra)"}, "WB" : {"fullname" : "Western blot", "shortname":"WB"}, "ICCIF" : {"fullname" : "Immunocytochemistry/ Immunofluorescence", "shortname":"ICC/IF"} }, "product-promise": { "all": "all", "testedAndGuaranteed": "tested", "guaranteed": "expected", "predicted": "predicted", "notRecommended": "not-recommended" } }, "values": { "Human": { "mIHC-species-checked": "testedAndGuaranteed", "mIHC-species-dilution-info": "", "mIHC-species-notes": "<p></p>", "IHCP-species-checked": "testedAndGuaranteed", "IHCP-species-dilution-info": "", "IHCP-species-notes": "<p>Incubate for 30 minutes at RT. Perform heat mediated antigen retrieval before commencing with IHC staining protocol by boiling tissue sections in 10mM citrate buffer, pH 6.0 for 10 min followed by cooling at RT for 20 min.</p>", "FlowCytIntra-species-checked": "testedAndGuaranteed", "FlowCytIntra-species-dilution-info": "", "FlowCytIntra-species-notes": "<p></p>", "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "", "WB-species-notes": "<p></p>", "ICCIF-species-checked": "testedAndGuaranteed", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "<p></p>" } } }

Product details

sb198380 is the carrier-free version of ab93741.

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 18 (CK18) also known as Keratin 18 or KRT18 is a type I intermediate filament protein with a molecular weight of approximately 45 kDa. It plays a mechanical role in stabilizing epithelial cell structure and function. CK18 is expressed in single-layered epithelial tissues such as the liver intestine and pancreas. It partners with the type II keratin usually KRT8 to form a stable cytoskeletal network in these cells providing structural integrity and resilience.
Biological function summary

CK18 maintains cellular integrity and mediates resistance to mechanical and non-mechanical stresses in epithelial cells. It forms heterodimers with KRT8 participating in a complex network of filaments important for maintaining cell shape and stability. This organization plays a role in managing cell survival during stress and apoptosis helping regulate cellular functions and responses in tissues where it is expressed.

Pathways

Cytokeratin 18 is involved in the apoptosis and cellular stress response pathways. It interacts with proteins such as caspases during apoptosis facilitating cytoskeletal reorganization and cell fragmentation. CK18 in coordination with KRT8 also participates in signaling pathways that regulate cell cycle and apoptotic processes underlining its importance in cellular turnover and tissue homeostasis.

Elevated levels of CK18 fragments are often observed in cases of non-alcoholic steatohepatitis (NASH) and breast cancer. It serves as a biomarker for liver injury due to its abundance in hepatocytes and release upon cell death. In breast cancer alterations in CK18 expression can reflect disease progression where it interacts with other proteins such as vimentin indicating epithelial-to-mesenchymal transition a process that facilitates metastasis.

Product protocols

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

Target data

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.
See full target information KRT18

Publications (1)

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

Communications biology 7:1062 PubMed39215205

2024

UNSEG: unsupervised segmentation of cells and their nuclei in complex tissue samples.

Applications

Unspecified application

Species

Unspecified reactive species

Bogdan Kochetov,Phoenix D Bell,Paulo S Garcia,Akram S Shalaby,Rebecca Raphael,Benjamin Raymond,Brian J Leibowitz,Karen Schoedel,Rhonda M Brand,Randall E Brand,Jian Yu,Lin Zhang,Brenda Diergaarde,Robert E Schoen,Aatur Singhi,Shikhar Uttam
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

Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.

For licensing inquiries, please contact partnerships@abcam.com