• Product name

    Anti-CD4 antibody [W3/25]
    See all CD4 primary antibodies
  • Description

    Mouse monoclonal [W3/25] to CD4
  • Host species

  • Specificity

    Detects the rat antigen (Mw 50kDa) present on a subset of T cells that have helper inducer activities. Binds to 86% thymocytes, 70% peripheral T lymphocytes and macrophages. No other cells are known to be recognised.
  • Tested applications

    Suitable for: Flow Cytmore details
    Unsuitable for: IHC-P
  • Species reactivity

    Reacts with: Rat
  • Immunogen

    Tissue, cells or virus corresponding to Rat CD4. Rat thymocyte membrane.

  • Positive control

    • Flow cyt: Lewis rat splenocytes.
  • General notes

    This antibody clone is manufactured by Abcam. If you require a custom buffer formulation or conjugation for your experiments, please contact orders@abcam.com.




Our Abpromise guarantee covers the use of ab6413 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
Flow Cyt Use a concentration of 0.2 µg/ml.
  • Application notes
    Is unsuitable for IHC-P.
  • Target

    • Function

      Accessory protein for MHC class-II antigen/T-cell receptor interaction. May regulate T-cell activation. Induces the aggregation of lipid rafts.
    • Sequence similarities

      Contains 3 Ig-like C2-type (immunoglobulin-like) domains.
      Contains 1 Ig-like V-type (immunoglobulin-like) domain.
    • Post-translational

      Palmitoylation and association with LCK contribute to the enrichment of CD4 in lipid rafts.
    • Cellular localization

      Cell membrane. Localizes to lipid rafts. Removed from plasma membrane by HIV-1 Nef protein that increases clathrin-dependent endocytosis of this antigen to target it to lysosomal degradation. Cell surface expression is also down-modulated by HIV-1 Envelope polyprotein gp160 that interacts with, and sequesters CD4 in the endoplasmic reticulum.
    • Information by UniProt
    • Database links

    • Alternative names

      • CD 4 antibody
      • CD4 (L3T4) antibody
      • CD4 antibody
      • CD4 antigen (p55) antibody
      • CD4 antigen antibody
      • CD4 molecule antibody
      • CD4 receptor antibody
      • CD4+ Lymphocyte deficiency, included antibody
      • CD4_HUMAN antibody
      • CD4mut antibody
      • L3T4 antibody
      • Leu3 antibody
      • Ly-4 antibody
      • Lymphocyte antigen CD4 antibody
      • MGC165891 antibody
      • OTTHUMP00000238897 antibody
      • p55 antibody
      • T cell antigen T4 antibody
      • T cell antigen T4/LEU3 antibody
      • T cell differentiation antigen L3T4 antibody
      • T cell OKT4 deficiency, included antibody
      • T cell surface antigen T4/Leu 3 antibody
      • T cell surface antigen T4/Leu3 antibody
      • T cell surface glycoprotein CD4 antibody
      • T-cell surface antigen T4/Leu-3 antibody
      • T-cell surface glycoprotein CD4 antibody
      • W3/25 antibody
      • W3/25 antigen antibody
      see all


    • Lewis rat splenocytes stained with ab6413 (right) or mouse IgG1κ (ab170190) isotype (left). Lewis rat splenocytes were incubated for 30 min on ice in 1x PBS / 10 % rat serum to block FC receptors and non-specific protein-protein interaction followed by the antibody (ab6413) or mouse IgG1κ (ab170190) (1x106 in 100 µl at 0.2 µg/ml) for 30 min on ice.

      The secondary antibody Goat anti-mouse IgG H&L (Alexa Fluor ® 488, pre-adsorbed) (ab150117) was used at 1/2000 dilution for 30 min on ice. The cells were simultaneously stained with CD3 antibody.

      Acquisition of >30,000 events were collected using a 50 mW Blue laser (488nm) and 530/30 bandpass filter. Events were gated on viable lymphocytes.



    This product has been referenced in:

    • Jefferies WA  et al. Authentic T helper CD4 (W3/25) antigen on rat peritoneal macrophages. J Exp Med 162:117-27 (1985). Read more (PubMed: 3159821) »
    • Barclay AN The localization of populations of lymphocytes defined by monoclonal antibodies in rat lymphoid tissues. Immunology 42:593-600 (1981). Read more (PubMed: 7016746) »
    See all 4 Publications for this product

    Customer reviews and Q&As

    1-3 of 3 Abreviews or Q&A


    Regarding the use of ab6413 in IHC-formalin fixed paraffin embedded sections, a 1:400 dilution is recommended and I suggest incubating overnight at 4 C. Please have your customer refer to our IHC-Paraffin sections protocol which can be found on our website (click on the protocols tab located on the online datasheet for ab6413). Also, your customer may want to take a look at the following publications which have used this antibody: Jefferies WA et al. Authentic T helper CD4 (W3/25) antigen on rat peritoneal macrophages. J Exp Med 162:117-27 (1985). PubMed: 3159821 Barclay AN The localization of populations of lymphocytes defined by monoclonal antibodies in rat lymphoid tissues. Immunology 42:593-600 (1981). PubMed: 7016746 Webb M et al. Inhibition of mixed lymphocyte response by monoclonal antibody specific for a rat T lymphocyte subset. Nature 282:841-3 (1979). PubMed: 160013 White RA et al. T-lymphocyte heterogeneity in the rat: separation of functional subpopulations using a monoclonal antibody. J Exp Med 148:664-73 (1978). PubMed: 29936

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    This antibody has not been tested in frozen tissue sections so we are not aware of its suitability. We do not routinely offer free or trial sized samples for testing purposes. Our policy at Abcam is that if an antibody does not work as specified on the datasheet, we will offer a replacement or reimbursement. Should you decide to test an antibody in an application for which we do not have any information, please let us know how you get on and in return we will forward a GBP10/ USD15/ EUR15 Amazon gift voucher.

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