• Product name

    Anti-CD44v6 antibody [VFF-18]
    See all CD44v6 primary antibodies
  • Description

    Mouse monoclonal [VFF-18] to CD44v6
  • Host species

  • Specificity

    Specific for an epitope encoded by exon v6 on the variant portion of human CD44.
  • Tested applications

    Suitable for: WB, IHC-P, ICC, Flow Cyt, IHC-Frmore details
  • Species reactivity

    Reacts with: Human
  • Immunogen

    Fusion protein corresponding to Human CD44v6. Glutathione S Transferase (GST) fusion protein corresponding to the variable domain v6 of human CD44.
    Database link: P16070

  • Epitope

    Specific for an epitope encoded by exon v6 on the variant portion of human CD44.
  • General notes

    This product was changed from ascites to tissue culture supernatant on 15th August 2017. The highest lot of ascites still in stock on 15th August 2017 is GR295277-3 . Lot numbers higher than GR295277-3 will be from tissue culture supernatant. Please note that the dilutions may need to be adjusted accordingly.



Our Abpromise guarantee covers the use of ab78960 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB Use at an assay dependent concentration. Detects a band of approximately 91 kDa (predicted molecular weight: 82 kDa).
IHC-P Use at an assay dependent concentration.
ICC 1/500.
Flow Cyt Use 1µg for 106 cells.

ab170190 - Mouse monoclonal IgG1, is suitable for use as an isotype control with this antibody.

IHC-Fr 1/500.


  • 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.
  • Tissue specificity

    Isoform 10 (epithelial isoform) is expressed by cells of epithelium and highly expressed by carcinomas. Expression is repressed in neuroblastoma cells.
  • Sequence similarities

    Contains 1 Link domain.
  • Domain

    The lectin-like LINK domain is responsible for hyaluronan binding.
  • Post-translational

    Proteolytically cleaved in the extracellular matrix by specific proteinases (possibly MMPs) in several cell lines and tumors.
    N- and O-glycosylated. O-glycosylation contains more-or-less-sulfated chondroitin sulfate glycans, whose number may affect the accessibility of specific proteinases to their cleavage site(s). It is uncertain if O-glycosylation occurs on Thr-637 or Thr-638.
    Phosphorylated; activation of PKC results in the dephosphorylation of Ser-706 (constitutive phosphorylation site), and the phosphorylation of Ser-672.
  • Cellular localization

    Membrane. Colocalizes with actin in membrane protrusions at wounding edges.
  • Information by UniProt
  • Database links

  • Alternative names

    • CD44 antibody
    • CD44 antigen antibody
    • CD44 isoform(s) antibody
    • CD44 molecule (Indian blood group) antibody
    • CD44 molecule antibody
    • Cd44 variant(s) antibody
    • CD44_HUMAN antibody
    • Cd44v antibody
    • CDw44 antibody
    • Cell surface glycoprotein CD44 antibody
    • Chondroitin sulfate proteoglycan 8 antibody
    • CSPG8 antibody
    • ECMR-III antibody
    • Epican antibody
    • Extracellular matrix receptor III antibody
    • GP90 lymphocyte homing/adhesion receptor antibody
    • HCELL antibody
    • Hematopoietic cell E and L selectin ligand antibody
    • Heparan sulfate proteoglycan antibody
    • Hermes antigen antibody
    • Homing function and Indian blood group system antibody
    • HUTCH I antibody
    • HUTCH-I antibody
    • Hyaluronate receptor antibody
    • IN antibody
    • LHR antibody
    • MC56 antibody
    • MDU2 antibody
    • MDU3 antibody
    • MIC4 antibody
    • MUTCH I antibody
    • PGP 1 antibody
    • PGP-1 antibody
    • PGP-I antibody
    • Pgp1 antibody
    • Phagocytic glycoprotein 1 antibody
    • Phagocytic glycoprotein I antibody
    • Soluble CD44 antibody
    see all


  • All lanes : Anti-CD44v6 antibody [VFF-18] (ab78960) at 1 µg/ml ((Ascites))

    Lane 1 : HepG2 (Human hepatocellular liver carcinoma cell line) Whole Cell Lysate
    Lane 2 : Caco 2 (Human colonic carcinoma cell line) Whole Cell Lysate

    Lysates/proteins at 10 µg per lane.

    All lanes : Goat Anti-Mouse IgG H&L (HRP) preadsorbed (ab97040) at 1/5000 dilution

    Developed using the ECL technique.

    Performed under reducing conditions.

    Predicted band size: 82 kDa
    Observed band size: 91 kDa
    why is the actual band size different from the predicted?
    Additional bands at: 36 kDa, 40 kDa. We are unsure as to the identity of these extra bands.

    Exposure time: 12 minutes

    CD44v6 contains a number of potential glycosylation sites (SwissProt) which may explain its migration at a higher molecular weight than predicted.

  • ab78960 (Ascites) staining CD44v6 in human breast cancer tissue by Immunohistochemistry (Frozen sections).Tissue was fixed in methanol and then blocked using 10% serum for 5 minutes at 25°C. Samples were then incubated with ab78960 at a 1/500 dilution for 1 hour at 25°C. The secondary used was an undiluted HRP conjugated goat polyclonal.

    See Abreview

  • Overlay histogram showing THP1 cells stained with ab78960 (Ascites) (red line). The cells were fixed with 80% methanol (5 min) and incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab78960, 1μg/1x106 cells) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-mouse IgG (H&L) (ab150113) at 1/2000 dilution for 30 min at 22°C. Isotype control antibody (black line) was mouse IgG1 [ICIGG1] (ab91353, 1μg/1x106 cells) used under the same conditions. Unlabelled sample (blue line) was also used as a control. Acquisition of >5,000 events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter. Please note that Abcam do not have any data for use of this antibody on non-fixed cells. We welcome any customer feedback.

  • Immunocytochemical analysis of methanol fixed cultured human breast epithelial organoids labeling CD44v6 with ab78960 (Ascites) at 1/500 dilution. UltraVision ONE HRP Polymer was used as the secondary antibody. 10% serum was used as the blocking agent. 

    See Abreview

  • IHC image of ab78960 (Ascites) staining in human breast carcinoma formalin fixed paraffin embedded tissue section, performed on a Leica BondTM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab78960, 1µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.

    For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.


This product has been referenced in:

  • Toden S  et al. Cancer stem cell-associated miRNAs serve as prognostic biomarkers in colorectal cancer. JCI Insight 4:N/A (2019). Read more (PubMed: 30895943) »
  • Nagata H  et al. LGR5 expression predicts peritoneal recurrence after curative resection of primary colon cancer. Br J Cancer 120:996-1002 (2019). Read more (PubMed: 31000786) »
See all 12 Publications for this product

Customer reviews and Q&As

1-7 of 7 Abreviews or Q&A


The IHC validation of this CD44v6 antibody, ab78960, was carried out on breast carcinoma tissue. We have sections of formalin-fixed, paraffin-embedded ductal breast carcinoma in our catalogue. The catalogue number is ab4697. A literature search suggested other possible control tissues, including uterine cervical carcinoma.

Read More
Blocking step
BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 1% · Temperature: 25°C
Human Cell (MKN45)
Yes - triton-X 100

Abcam user community

Verified customer

Submitted Aug 02 2013

Western blot
Loading amount
30 µg
Gel Running Conditions
Reduced Denaturing
Human Cell lysate - whole cell (AGS)
Blocking step
BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 3% · Temperature: 25°C

Abcam user community

Verified customer

Submitted Jul 08 2013


Thank you for your patience while I looked into your question. Ab78960 has not been validated for neutralization studies; however, it has been used in functional assay in Weiss JM et al., The Journal of Cell Biology, Volume 137, 1997. (pubMed ID 9166413) I hope this information helps. Please do not hesitate to contact us again if you need any further assistance.

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Thank you for your inquiry. I do not have any information available stating that this antibody can be used for inhibition studies. I will inquire with the antibody originator to see if they have any further information, but it may be that the antibody has not been tested in this way previously. Should I obtain any further information, I will be sure to forward this to you. Have a wonderful day!

Read More
Human Cultured Cells (Human breast primary culture)
Human breast primary culture
Blocking step
Serum as blocking agent for 5 minute(s) · Concentration: 10% · Temperature: 25°C

Dr. Rene Villadsen

Verified customer

Submitted Jun 23 2011

Immunohistochemistry (Frozen sections)
Human Tissue sections (Breast cancer)
Breast cancer
Blocking step
Serum as blocking agent for 5 minute(s) · Concentration: 10% · Temperature: 25°C

Dr. Rene Villadsen

Verified customer

Submitted Jun 23 2011

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