Anti-CD44 antibody [EPR18668] (ab189524)

Anti-CD44 antibody [EPR18668] (ab189524) is a rabbit monoclonal antibody detecting CD44 in Western Blot, IP, IHC-P. Suitable for Human, Mouse, Rat.

- KO validated for confirmed specificity

- Biophysical QC for unrivalled batch-batch consistency

- Over 70 publications

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Images

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (AB189524), expandable thumbnail

Publications

Key facts

Isotype: IgG
Host species: Rabbit
Storage buffer: pH: 7.2 - 7.4
Preservative: 0.01% Sodium azide
Constituents: PBS, 40% Glycerol (glycerin, glycerine), 0.05% BSA
Form: Liquid
Clonality: Monoclonal

Immunogen

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

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Reactivity data

Select an application

Product promiseTestedExpectedPredictedNot recommended

	IP	Flow Cyt	WB	ICC/IF	IHC-P
Human	Tested	Not recommended	Tested	Not recommended	Tested
Mouse	Expected	Not recommended	Tested	Not recommended	Tested
Rat	Expected	Not recommended	Tested	Not recommended	Tested

Tested
Tested

Species	Dilution info	Notes
Species Human	Dilution info 1/30	Notes Perform heat-mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.

Expected
Expected

Species	Dilution info	Notes
Species Mouse, Rat	Dilution info Use at an assay dependent concentration.	Notes -

Not recommended
Not recommended

Species	Dilution info	Notes
Species Human	Dilution info -	Notes Perform heat-mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Species Mouse	Dilution info -	Notes -
Species Rat	Dilution info -	Notes -

Tested
Tested

Species	Dilution info	Notes
Species Mouse	Dilution info 1/1000	Notes Perform heat-mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Species Rat	Dilution info 1/1000	Notes -
Species Human	Dilution info 1/1000	Notes -

Not recommended
Not recommended

Species	Dilution info	Notes
Species Human, Mouse, Rat	Dilution info -	Notes -

Tested
Tested

Species	Dilution info	Notes
Species Mouse	Dilution info 1/4000	Notes Perform heat-mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Species Rat	Dilution info 1/4000	Notes Perform heat-mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Species Human	Dilution info 1/4000	Notes Perform heat-mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.

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Target data

See full target information CD44

Function

The protein expressed by gene CD44 functions as a cell-surface receptor involved in cell-cell interactions, cell adhesion, and migration, allowing cells to detect and react to changes in their tissue microenvironment. It is implicated in numerous cellular processes, including the activation, recirculation, and homing of T-lymphocytes, hematopoiesis, inflammation, and the response to bacterial infection. Through its ectodomain, CD44 interacts with extracellular matrix components like hyaluronan, collagen, growth factors, cytokines, and proteases, serving as a platform for signal transduction by forming protein complexes with receptor kinases and membrane proteases via its cytoplasmic domain. Effectors such as PKN2, the RhoGTPases RAC1 and RHOA, Rho-kinases, and phospholipase C coordinate signaling pathways that promote calcium mobilization and actin-mediated cytoskeleton reorganization crucial for cell migration and adhesion. This supplementary information is collated from multiple sources and compiled automatically.

Alternative names

CD44, LHR, MDU2, MDU3, MIC4, CD44 antigen, CDw44, Epican, Extracellular matrix receptor III, GP90 lymphocyte homing/adhesion receptor, HUTCH-I, Heparan sulfate proteoglycan, Hermes antigen, Hyaluronate receptor, Phagocytic glycoprotein 1, Phagocytic glycoprotein I, ECMR-III, PGP-1, PGP-I

Key facts

Isotype: IgG
Host species: Rabbit
Storage buffer: pH: 7.2 - 7.4
Preservative: 0.01% Sodium azide
Constituents: PBS, 40% Glycerol (glycerin, glycerine), 0.05% BSA
Form: Liquid
Clonality: Monoclonal
Immunogen: The exact immunogen used to generate this antibody is proprietary information.
Clone number: EPR18668
Purification technique: Affinity purification Protein A
Concentration

Storage

Shipped at conditions: Blue Ice
Appropriate short-term storage duration: 1-2 weeks
Appropriate short-term storage conditions: +4°C
Appropriate long-term storage conditions: -20°C
Aliquoting information: Upon delivery aliquot
Storage information: Avoid freeze / thaw cycle

Notes

What is this antibody validated in?

Anti-CD44 antibody [EPR18668] (ab189524) is a rabbit recombinant monoclonal antibody and is validated for use in Western Blot (WB), Immunoprecipitation (IP), Immunohistochemistry (IHC-P) in Human, Mouse, Rat samples.

What is the molecular weight of CD44?

Anti-CD44 [EPR18668] (ab189524) specifically detects a band for CD44 (UniProt: P16070) at a molecular weight of 82kDa.

Trusted by the scientific community

Anti-CD44 [EPR18668] (ab189524) was first used in a scientific publication in 2017 and has been cited over 70 times in peer-reviewed journals.

Trial sizes available!

Test your antibody or perform pre-screening before committing to a larger quantity. Sold in 10µl. Discover our selection of trial-size antibodies.

Specificity confirmed

The specificity of Anti-CD44 antibody [EPR18668] (ab189524) has been confirmed by Western blot testing in CD44 Knockout HeLa cells.

Other related products

We have a range of other formats of antibody clone [EPR18668] also available for your convenience:
ab189524, Carrier free - ab232556, Alexa Fluor® 488 - ab284640, Alexa Fluor® 647 - ab314280

Patented technology
Our RabMAb^® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb^® patents.

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.

Product promise

We are dedicated to supporting your work with high quality reagents and we are here for you every step of the way should you need us.

In the unlikely event of one of our products not working as expected, you are covered by our product promise.

Full details and terms and conditions can be found here:
Terms & Conditions.

16 product images

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded human breast tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on human breast [PMID: 20103682].
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Western blot - Anti-CD44 antibody [EPR18668] (ab189524)
False colour image of Western blot: Anti-CD44 antibody [EPR18668] staining at 1/1000 dilution, shown in green; Mouse anti-Alpha Tubulin [DM1A] (Anti-alpha Tubulin antibody [DM1A] - Loading Control ab7291) loading control staining at 1/20000 dilution, shown in red. In Western blot, ab189524 was shown to bind specifically to CD44. A band was observed at 70-85 kDa in wild-type HeLa cell lysates with no signal observed at this size in CD44 knockout cell line Human CD44 knockout HeLa cell line ab262515 (knockout cell lysate Human CD44 knockout HeLa cell lysate ab263938). To generate this image, wild-type and CD44 knockout HeLa cell lysates were analysed. First, samples were run on an SDS-PAGE gel then transferred onto a nitrocellulose membrane. Membranes were blocked in 3 % milk in TBS-0.1 % Tween^® 20 (TBS-T) before incubation with primary antibodies overnight at 4°C. Blots were washed four times in TBS-T, incubated with secondary antibodies for 1 h at room temperature, washed again four times then imaged. Secondary antibodies used were Goat anti-Rabbit IgG H&L (IRDye^® 800CW) preabsorbed (Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed ab216773) and Goat anti-Mouse IgG H&L (IRDye^® 680RD) preabsorbed (Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed ab216776) at 1/20000 dilution.
All lanes: Western blot - Anti-CD44 antibody [EPR18668] (ab189524) at 1/1000 dilution
Lane 1: Wild-type HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell lysate at 20 µg
Lane 2: CD44 knockout HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell lysate at 20 µg
Lane 2: Western blot - Human CD44 knockout HeLa cell line (Human CD44 knockout HeLa cell line ab262515)
Lane 3: A549 (Human lung carcinoma cell line) whole cell lysate at 20 µg
Lane 4: LNCaP (Human prostate cancer cell line) whole cell lysate at 20 µg
Performed under reducing conditions.
Predicted band size: 81 kDa
Observed band size: 70-85 kDa
Immunoprecipitation - Anti-CD44 antibody [EPR18668] (ab189524)
CD44v6 was immunoprecipitated from 1 mg of A549 (Human lung carcinoma cell line) whole cell lysate with ab189524 at 1/25 dilution. Western blot was performed from the immunoprecipitate using ab189524 at 1/1000 dilution. VeriBlot for IP Detection Reagent (HRP) (VeriBlot for IP Detection Reagent (HRP) ab131366), was used for detection at 1/10000 dilution.
Lane 1: A549 whole cell lysate 10 μg (Input).
Lane 2: ab189524 IP in A549 whole cell lysate.
Lane 3: Rabbit monoclonal IgG (Rabbit IgG, monoclonal [EPR25A] - Isotype Control ab172730) instead of ab189524 in A549 whole cell lysate.
Blocking and dilution buffer and concentration: 5% NFDM/TBST.
Exposure time: 1 second.
All lanes: Immunoprecipitation - Anti-CD44 antibody [EPR18668] (ab189524)
Predicted band size: 81 kDa
Western blot - Anti-CD44 antibody [EPR18668] (ab189524)
Lanes 1 - 4: Merged signal (red and green). Green - ab189524 observed at 80 kDa. Red - loading control, Anti-alpha Tubulin antibody [DM1A] - Loading Control ab7291 (Mouse anti-Alpha Tubulin [DM1A]) observed at 55kDa.
ab189524 was shown to react with CD44 in wild-type HeLa cells in western blot. Loss of signal was observed when CD44 knockout sample was used. Wild-type HeLa and CD44 knockout cell lysates were subjected to SDS-PAGE. Membranes were blocked in 3% milk in TBS-T (0.1% Tween^®) before incubation with ab189524 and Anti-alpha Tubulin antibody [DM1A] - Loading Control ab7291 (Mouse anti-Alpha Tubulin [DM1A]) overnight at 4°C at a 1 in 1000 Dilution and a 1 in 20000 dilution respectively. Blots were incubated with Goat anti-Rabbit IgG H&L (IRDye^® 800CW) preabsorbed (Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed ab216773) and Goat anti-Mouse IgG H&L (IRDye^® 680RD) preabsorbed (Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed ab216776) secondary antibodies at 1 in 20000 dilution for 1 hour at room temperature before imaging.
All lanes: Western blot - Anti-CD44 antibody [EPR18668] (ab189524) at 1/1000 dilution
Lane 1: Wild-type HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell lysate at 20 µg
Lane 2: CD44 knockout HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell lysate at 20 µg
Lane 2: Western blot - Human CD44 knockout HeLa cell line (Human CD44 knockout HeLa cell line ab262515)
Lane 3: A549 (Human lung carcinoma cell line) whole cell lysate at 20 µg
Lane 4: LNCaP (Human prostate cancer cell line) whole cell lysate at 20 µg
Performed under reducing conditions.
Predicted band size: 81 kDa
Observed band size: 80 kDa
Western blot - Anti-CD44 antibody [EPR18668] (ab189524)
Blocking/Dilution buffer: 5% NFDM/TBST.
All lanes: Western blot - Anti-CD44 antibody [EPR18668] (ab189524) at 1/1000 dilution
Lane 1: Human fetal brain lysate at 10 µg
Lane 2: Human fetal heart lysate at 10 µg
Lane 3: Human fetal kidney lysate at 10 µg
Lane 4: Human fetal spleen lysate at 10 µg
Secondary
All lanes: Western blot - VeriBlot for IP Detection Reagent (HRP) (VeriBlot for IP Detection Reagent (HRP) ab131366) at 1/10000 dilution
Predicted band size: 81 kDa
Observed band size: 82 kDa
Exposure time: 5s
Western blot - Anti-CD44 antibody [EPR18668] (ab189524)
Blocking/Dilution buffer: 5% NFDM/TBST.
Due to high sequence homology between CD44 isoforms, within the immunogen region, this antibody cross reacts with most isoforms of CD44. The staining pattern is consistent with reference (PMID 19507218).
All lanes: Western blot - Anti-CD44 antibody [EPR18668] (ab189524) at 1/2000 dilution
Lane 1: Human thymus lysate at 10 µg
Lane 2: Human skin lysate at 10 µg
Lane 3: A549 (Human lung carcinoma cell line) whole cell lysate at 10 µg
Lane 4: U-87 MG (Human glioblastoma-astrocytoma epithelial cell line) whole cell lysate at 10 µg
Secondary
Lanes 1 - 2: Western blot - VeriBlot for IP Detection Reagent (HRP) (VeriBlot for IP Detection Reagent (HRP) ab131366) at 1/10000 dilution
Lanes 3 - 4: Western blot - Goat Anti-Rabbit IgG H&L (HRP) (Goat Anti-Rabbit IgG H&L (HRP) ab97051) at 1/100000 dilution
Predicted band size: 81 kDa
Observed band size: 82 kDa
Exposure time: 1s
Western blot - Anti-CD44 antibody [EPR18668] (ab189524)
Blocking/Dilution buffer: 5% NFDM/TBST.
Exposure time: Lane 1, 2, 3, 4, 5 and 6: 5 seconds; Lane 7, 8, 9 and 10: 1 second.
Lanes 1 - 6: Western blot - Anti-CD44 antibody [EPR18668] (ab189524) at 1/1000 dilution
Lanes 7 - 10: Western blot - Anti-CD44 antibody [EPR18668] (ab189524) at 1/20000 dilution
Lane 1: Mouse brain lysate at 10 µg
Lane 2: Mouse spleen lysate at 10 µg
Lane 3: Rat brain lysate at 10 µg
Lane 4: Rat heart lysate at 10 µg
Lane 5: Rat kidney lysate at 10 µg
Lane 6: Rat spleen lysate at 10 µg
Lane 7: C6 (Rat glial tumor cell line) whole cell lysate
Lane 8: RAW 264.7 (Mouse macrophage cell line transformed with Abelson murine leukemia virus) whole cell lysate
Lane 9: PC-12 (Rat adrenal gland pheochromocytoma cell line) whole cell lysate
Lane 10: NIH/3T3 (Mouse embryonic fibroblast cell line) whole cell lysate
Secondary
All lanes: Western blot - Goat Anti-Rabbit IgG H&L (HRP) (Goat Anti-Rabbit IgG H&L (HRP) ab97051) at 1/100000 dilution
Predicted band size: 81 kDa
Observed band size: 82 kDa
Western blot - Anti-CD44 antibody [EPR18668] (ab189524)
ab189524 was shown to react with CD44 in wild-type HAP1 cells in Western blot with loss of signal observed in a CD44 knockout cell line. Wild-type HAP1 and CD44 knockout cell lysates were subjected to SDS-PAGE. Membranes were blocked in 5% milk in TBST for 1 hr before incubation with ab189524 overnight at 4 °C at a 1/1000 dilution. Blots were incubated with goat anti-rabbit HRP secondary antibodies at 0.2ug/mL before imaging. These data were provided by YCharOS Inc., an open science company with the mission of characterizing commercially available antibody reagents for all human proteins. Abcam and YCharOS are working together to help address the reproducibility crisis by enabling the life science community to better evaluate commercially available antibodies.
All lanes: Western blot - Anti-CD44 antibody [EPR18668] (ab189524) at 1/1000 dilution
Lane 1: Wild-type HAP1 cell lysate at 20 µg
Lane 2: CD44 knockout HAP1 cell lysate at 20 µg
Performed under reducing conditions.
Predicted band size: 81 kDa
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded human kidney tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on human kidney.
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded human tonsil tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on human tonsil.
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded human breast cancer tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on human breast cancer [PMID: 15867228].
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded mouse colon tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on mouse colon.
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded mouse stomach tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on mouse stomach.
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded mouse spleen tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on mouse spleen.
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded rat stomach tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous staining on rat stomach.
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD44 antibody [EPR18668] (ab189524)
Immunohistochemical analysis of paraffin-embedded rat spleen tissue labeling CD44 with ab189524 at 1/4000 dilution, followed by Goat Anti-Rabbit IgG H&L (HRP) Ready to use. Membranous and weak cytoplasmic staining on rat spleen.
Counter stained with Hematoxylin.
Secondary antibody only control: Used PBS instead of primary antibody, secondary antibody is Goat Anti-Rabbit IgG H&L (HRP) Ready to use.
Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.