- Clone
- RPA-T4 (See other available formats)
- Regulatory Status
- RUO
- Workshop
- IV T114
- Other Names
- T4
- Isotype
- Mouse IgG1, κ
- Ave. Rating
- Submit a Review
- Product Citations
- publications
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CD4, also known as T4, is a 55 kD single-chain type I transmembrane glycoprotein expressed on most thymocytes, a subset of T cells, and monocytes/macrophages. CD4, a member of the Ig superfamily, recognizes antigens associated with MHC class II molecules, and participates in cell-cell interactions, thymic differentiation, and signal transduction. CD4 acts as a primary receptor for HIV, binding to HIV gp120. CD4 has also been shown to interact with IL-16.
Product DetailsProduct Details
- Verified Reactivity
- Human
- Reported Reactivity
- Chimpanzee
- Antibody Type
- Monoclonal
- Host Species
- Mouse
- Formulation
- 0.2 µm filtered in phosphate-buffered solution, pH 7.2, containing no preservative.
- Endotoxin Level
- Less than 0.01 EU/µg of the protein (< 0.001 ng/µg of the protein) as determined by the LAL test.
- Preparation
- The Ultra-LEAF™ (Low Endotoxin, Azide-Free) antibody was purified by affinity chromatography.
- Concentration
- The antibody is bottled at the concentration indicated on the vial, typically between 2 mg/mL and 3 mg/mL. Older lots may have also been bottled at 1 mg/mL. To obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C. This Ultra-LEAF™ solution contains no preservative; handle under aseptic conditions.
- Application
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FC - Quality tested
CyTOF® - Verified
Activ, Block, IHC - Reported in the literature, not verified in house - Recommended Usage
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Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤ 2.0 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.
- Application Notes
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The RPA-T4 antibody binds to the D1 domain of CD4 (CDR1 and CDR3 epitopes) and can block HIV gp120 binding and inhibit syncytia formation. Additional reported applications (for the relevant formats) include: immunohistochemistry of acetone-fixed frozen sections3,4,5, blocking of T cell activation1,2, and spatial biology (IBEX)10,11. This clone was tested in-house and does not work on formalin fixed paraffin-embedded (FFPE) tissue. The Ultra-LEAF™ purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 300569 - 300574).
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Application References
(PubMed link indicates BioLegend citation) -
- Knapp W, et al. 1989. Leucocyte Typing IV. Oxford University Press. New York. (Activ)
- Moir S, et al. 1999. J. Virol. 73:7972. (Activ)
- Deng MC, et al. 1995. Circulation 91:1647. (IHC)
- Friedman T, et al. 1999. J. Immunol. 162:5256. (IHC)
- Mack CL, et al. 2004. Pediatr. Res. 56:79. (IHC)
- Lan RY, et al. 2006. Hepatology 43:729.
- Zenaro E, et al. 2009. J. Leukoc. Biol. 86:1393. (FC) PubMed
- Yoshino N, et al. 2000. Exp. Anim. (Tokyo) 49:97. (FC)
- Stoeckius M, et al. 2017. Nat. Methods. 14:865. (PG)
- Radtke AJ, et al. 2020. Proc Natl Acad Sci USA. 117:33455-33465. (SB) PubMed
- Radtke AJ, et al. 2022. Nat Protoc. 17:378-401. (SB) PubMed
- Product Citations
-
- RRID
-
AB_2810427 (BioLegend Cat. No. 300569)
AB_2810427 (BioLegend Cat. No. 300570)
AB_2810427 (BioLegend Cat. No. 300571)
AB_2810427 (BioLegend Cat. No. 300572)
AB_2810427 (BioLegend Cat. No. 300573)
AB_2810427 (BioLegend Cat. No. 300574)
Antigen Details
- Structure
- Ig superfamily, type I transmembrane glycoprotein, 55 kD
- Distribution
-
T cell subset, majority of thymocytes, monocytes/macrophages
- Function
- MHC class II co-receptor, lymphocyte adhesion, thymic differentiation, HIV receptor
- Ligand/Receptor
- MHC class II molecules, HIV gp120, IL-16
- Cell Type
- Dendritic cells, Macrophages, Monocytes, T cells, Thymocytes, Tregs
- Biology Area
- Immunology
- Molecular Family
- CD Molecules
- Antigen References
-
1. Center D, et al. 1996. Immunol. Today 17:476.
2. Gaubin M, et al. 1996. Eur. J. Clin. Chem. Clin. Biochem. 34:723. - Gene ID
- 920 View all products for this Gene ID
- UniProt
- View information about CD4 on UniProt.org
Related FAQs
- I am unable to see expression of T cell markers such as CD3 and CD4 post activation.
- TCR-CD3 complexes on the T-lymphocyte surface are rapidly downregulated upon activation with peptide-MHC complex, superantigen or cross-linking with anti-TCR or anti-CD3 antibodies. PMA/Ionomycin treatment has been shown to downregulate surface CD4 expression. Receptor downregulation is a common biological phenomenon and so make sure that your stimulation treatment is not causing it in your sample type.
- Do you guarantee that your antibodies are totally pathogen free?
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BioLegend does not test for pathogens in-house aside from the GoInVivo™ product line. However, upon request, this can be tested on a custom basis with an outside, independent laboratory.
- Does BioLegend test each Ultra-LEAF™ antibody by functional assay?
-
No, BioLegend does not test Ultra-LEAF™ antibodies by functional assays unless otherwise indicated. Due to the possible complexities and variations of uses of biofunctional antibodies in different assays and because of the large product portfolio, BioLegend does not currently perform functional assays as a routine QC for the antibodies. However, we do provide references in which the antibodies were used for functional assays and we do perform QC to verify the specificity and quality of the antibody based on our strict specification criteria.
- Does BioLegend test each Ultra-LEAF™ antibody for potential pathogens?
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No, BioLegend does not test for pathogens in-house unless otherwise indicated. However, we can recommend an outside vendor to perform this testing as needed.
- Have you tested this Ultra-LEAF™ antibody for in vivo or in vitro applications?
-
We don't test our antibodies for in vivo or in vitro applications unless otherwise indicated. Depending on the product, the TDS may describe literature supporting usage of a particular product for bioassay. It may be best to further consult the literature to find clone specific information.
Other Formats
View All CD4 Reagents Request Custom ConjugationCustomers Also Purchased
Compare Data Across All Formats
This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
If you need assistance with selecting the best format contact our expert technical support team.
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APC anti-human CD4
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Biotin anti-human CD4
Human peripheral blood lymphocytes stained with biotinylated... -
FITC anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 FITC Confocal image of human lymph node sample acquired using the... -
PE anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 PE Human peripheral blood was stained with CD4 (clone RPA-T4) P... -
PE/Cyanine5 anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 PE/Cy... -
PE/Cyanine7 anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 PE/Cy... -
Purified anti-human CD4
Human peripheral blood lymphocytes stained with purified RPA... -
APC/Cyanine7 anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
Alexa Fluor® 488 anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 Alexa... Human peripheral blood mononuclear cells were fixed with 2% ... Human peripheral blood mononuclear cells were fixed with 1% ... -
Alexa Fluor® 647 anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 Alexa... Confocal image of human spleen sample acquired using the IBE... Confocal image of human lymph node sample acquired using the... -
Pacific Blue™ anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 Pacif... -
Brilliant Violet 421™ anti-human CD4
Human peripheral mononuclear cells were fixed with 1% Parafo... Human peripheral blood lymphocytes were stained with CD3 FIT... -
Alexa Fluor® 700 anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 Alexa... Confocal image of human metastatic lymph node sample acquire... -
PerCP anti-human CD4
Human peripheral blood lymphocytes stained with RPA-T4 PerCP -
PerCP/Cyanine5.5 anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
Brilliant Violet 570™ anti-human CD4
Human peripheral blood lymphocytes were stained with CD3 FIT... -
Brilliant Violet 650™ anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
Purified anti-human CD4 (Maxpar® Ready)
Human PBMCs stained with 154Sm-anti-CD45 (HI30) and 145Nd-an... -
Alexa Fluor® 594 anti-human CD4
Human peripheral blood mononuclear cells were fixed with 2% ... Human peripheral blood lymphocytes were stained with CD4 (cl... -
Brilliant Violet 510™ anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
PE/Dazzle™ 594 anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
Brilliant Violet 785™ anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
Brilliant Violet 605™ anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
Brilliant Violet 711™ anti-human CD4
Human peripheral blood lymphocytes were stained with CD4 (cl... -
APC/Fire™ 750 anti-human CD4
Human peripheral blood lymphocytes were stained with CD3 FIT... -
CD4 Fluorophore Sampler Kit
Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... -
CD4 Fluorophore Sampler Kit with Veri-Cells™ PBMC
Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... Veri-Cells™ PBMC were stained with anti-human CD4 (clone RPA... -
TotalSeq™-A0072 anti-human CD4
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TotalSeq™-B0072 anti-human CD4
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TotalSeq™-C0072 anti-human CD4
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Ultra-LEAF™ Purified anti-human CD4
Human peripheral blood lymphocytes stained with LEAF™ purifi... -
TotalSeq™-D0072 anti-human CD4
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