SKU PA1021-2
Size 100μg/vial
Reactivity Human, Mouse, Rat
Clonality Polyclonal
Host Rabbit
Ig Isotype N/A
Applications IHC, ICC, WB


Product Name Anti-CD44 Antibody
SKU/Catalog Number PA1021-2
Storage & Handling At -20°C for one year. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for a longer time.Avoid repeated freezing and thawing.
Size 100μg/vial
Description Rabbit IgG polyclonal antibody for CD44 antigen(CD44) detection. Tested with WB, IHC-P, IHC-F, ICC in Human;Mouse;Rat.
Cite This Product Anti-CD44 Antibody (Boster Biological Technology, Pleasanton CA, USA, Catalog # PA1021-2)
Host Rabbit
Contents/Buffer Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg Thimerosal, 0.05mg NaN3.
Form Lyophilized
Immunogen A synthetic peptide corresponding to a sequence at the C-terminus of human CD44(728-742aa DETRNLQNVDMKIGV), different from the related mouse and rat sequences by one amino acid.
Reactivity Human, Mouse, Rat

Assay Details

Assay Dilutions Overview

Concentration: Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
Immunohistochemistry(Paraffin-embedded Section), 0.5-1μg/ml, Human, Rat, Mouse, By Heat
Immunocytochemistry , 0.5-1μg/ml, Human, Mouse, Rat
Immunohistochemistry(Frozen Section), 0.5-1μg/ml, Rat, Human, Mouse
Western blot, 0.1-0.5μg/ml, Human, Mouse, Rat

Boster's Secondary Antibodies And IHC, WB Kits

The following reagents are used to generate the images below.

Boster recommends Enhanced Chemiluminescent Kit with anti-Rabbit IgG (EK1002) for Western blot, and HRP Conjugated anti-Rabbit IgG Super Vision Assay Kit (SV0002-1) for IHC(P), IHC(F) and ICC.

Images And Assay Conditions

Anti-CD44 antibody, PA1021-2, IHC(P)
IHC(P): Human Intestinal Cancer Tissue

Anti-CD44 antibody, PA1021-2, IHC(P)
IHC(P): Rat Intestine Tissue

Anti-CD44 antibody, PA1021-2, ICC
ICC: HCT116 Cell

Anti-CD44 antibody, PA1021-2, IHC(F)
IHC(F): Rat Intestine Tissue

Anti-CD44 antibody, PA1021-2, Western blotting
All lanes: Anti CD44 (PA1021-2) at 0.5ug/ml
Lane 1: Rat Testis Tissue Lysate at 50ug
Lane 2: Rat Ovary Tissue Lysate at 50ug
Lane 3: HELA Whole Cell Lysate at 40ug
Lane 4: HEPA Whole Cell Lysate at 40ug
Predicted bind size: 82KD
Observed bind size: 82KD

Target Info

Protein Target Info (Source:

Uniprot Id P16070
Gene Name CD44
Protein Name CD44 antigen
Tissue Specificity Isoform 10 (epithelial isoform) is expressed by cells of epithelium and highly expressed by carcinomas. Expression is repressed in neuroblastoma cells.
Alternative Names CD44 antigen;CDw44;Epican;Extracellular matrix receptor III;ECMR-III;GP90 lymphocyte homing/adhesion receptor;HUTCH-I;Heparan sulfate proteoglycan;Hermes antigen;Hyaluronate receptor;Phagocytic glycoprotein 1;PGP-1;Phagocytic glycoprotein I;PGP-I;CD44;CD44;LHR, MDU2, MDU3, MIC4;
Subcellular Localization Cell membrane; Single-pass type I membrane protein. Colocalizes with actin in membrane protrusions at wounding edges. .
Molecular Weight 81538 MW

*if product is indicated to react with multiple species, protein info is based on the human gene.


Protein Function Receptor for hyaluronic acid (HA). Mediates cell-cell and cell-matrix interactions through its affinity for HA, and possibly also through its affinity for other ligands such as osteopontin, collagens, and matrix metalloproteinases (MMPs). Adhesion with HA plays an important role in cell migration, tumor growth and progression. In cancer cells, may play an important role in invadopodia formation. Also involved in lymphocyte activation, recirculation and homing, and in hematopoiesis. Altered expression or dysfunction causes numerous pathogenic phenotypes. Great protein heterogeneity due to numerous alternative splicing and post-translational modification events. .
Research Areas Human, Mouse, Rat

*You can search these to find other products in these research areas.
Background The CD44 gene, which is a transmembrane protein, is expressed as a family of molecular isoforms generated from alternative RNA splicing and posttranslational modifications. The gene, which contains 19 exons spanning some 50 kb of genomic DNA, is a widely expressed integral membrane protein that acts as a receptor for hyaluronan(HA) and is important to cell-extracellular matrix interaction. CD44 binding with HA can play an important role in cellular aggregation and tumor cell growth. CD44 is necessary for limb development and functions in a novel growth factor presentation mechanism. A specific CD44 splice variant is crucial for the proliferation of these mesenchymal cells. CD44 glycoproteins are involved in leukocyte extravasation but also in the regulation of growth factor activation, stability, and signaling. Moreover, it plays a pivotal role in arteriogenesis.

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Polyclonal antibody for CD44 detection. Host: Rabbit.Size: 100μg/vial. Tested applications: IHC-P. Reactive species: Human. CD44 information: Molecular Weight: 81538 MW; Subcellular Localization: Cell membrane; Single-pass type I membrane protein. Colocalizes with actin in membrane protrusions at wounding edges; Tissue Specificity: Isoform 10 (epithelial isoform) is expressed by cells of epithelium and highly expressed by carcinomas. Expression is repressed in neuroblastoma cells.
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Buy one primary antibody get one 0.5ml HRP or Biotin secondary antibody for free.
*Sample sizes are prepared on demand and will take extra lead time. (cannot be conjugated)



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Li B, Chu X, Gao M, Li W. Acta Biochim Biophys Sin (Shanghai). 2010 Jan;42(1):80-9. Apoptotic Mechanism Of Mcf-7 Breast Cells In Vivo And In Vitro Induced By Photodynamic Therapy With C-Phycocyanin.

Customer Q&As

  • Q: Do you offer BSA-free antibodies? Keyword: Bovine serum albumin, carrier protein, conjugation
    A: Yes, please contact us at for more information about BSA-free antibodies and availability. The new BSA-free formula uses trehalose as a replacement to BSA. We have tested many alternative chemicals and found that trehalose protects the antibodies the best.
  • Q: Is your western blot protocol provided from the website applicable for all your antibodies? Keyword: applications, WB
    A: The protocol is applicable for all our antibodies in WB, the NC Membrane(0.45μm or 0.22μm) and transfer time(70 mins or 50 mins) depends on the protein molecular weight, details can be found in included protocol.
  • Q: Can I conjugate markers to this antibody? Can I link custom conjugates to this antibody? Keyword: conjugation
    A: The antibody is stored with BSA and cannot be conjugated with markers. Carrier free antibodies are available upon request. Please contact
  • Q: What should I use for negative control?
    A: Please contact us for negative control suggestions. You can also check expression databases such as genecards, uniprot etc. Due to logistic reasons, we do not sell serum or lysates that we use internally for positive or negative control.
  • Q: Where can I find troubleshooting information? What should I do if I have unexpected bands, high background, no signal, weak signal
    A: You can find Boster's troubleshoot guides under tech support tab. Please contact us for further assistance on troubleshooting your experiment.
  • Q: What is the immunogen sequence of this antibody? Is this antibody polyclonal or monoclonal?
    A: You can find the immunogen sequence under "
  • Q: What is the expected band size? Why is it different than the observed band size?
    A: The expected band size is predicted on the size of the protein. The actual band size may be affected by a few other factors including but not limited to:<br>1. Post-translational modification:phosphorylation, methylation, glycosylation etc. These modifications prevent SDS molecules from binding to the target protein and thus make the band size appear larger than expected<br>2. Post-translational cleavage: this can cause smaller bands and or multiple bands <br><br>3. Alternative splicing: the same gene can have alternative splicing patterns generating different size proteins, all with reactivities to the antibody. <br><br>4. Amino Acid R chain charge: SDS binds to positive charges. The different size and charge of the Amino Acid side chains can affect the amount of SDS binding and thus affect the observed band size.<br>5. Multimers: Multimers are usually broken up in reducing conditions. However if the interactions between the multimers are strong, the band may appear higher., <br>
  • Q: What is the suggested dilution ratio for Western Blot (WB), Immunohistochemistry (IHC) and or ELISA standards? What is the optimal pH for the sample?
    A: Check the datasheet for the product for details on dilution ratios for different experiments. You can find the datasheet button on the right side of the product page.
  • Q: What is the protocol you used for your Western blotting (WB) and Immunohistochemistry (IHC)?
    A: Check our protocols under the tech support tab.
  • Q: What are some alternative names that could be used to describe this product?
    A: Some common names include but are not limited to cd44 antibody, cd 44 antibody
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