- RM4-4 (See other available formats)
- Regulatory Status
- Other Names
- L3T4, T4
- Rat IgG2b, κ
- Ave. Rating
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- Product Citations
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CD4 is a 55 kD protein, also known as L3T4 or T4. It is a member of the Ig superfamily, primarily expressed on most thymocytes and a subset of T cells, and weakly on macrophages and dendritic cells. It acts as a coreceptor with the TCR during T cell activation and thymic differentiation by binding MHC class II and associating with the protein tyrosin kinase, lck.Product Details
- Antibody Type
- Host Species
- BALB/c mouse thymocytes
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
- The antibody was purified by affinity chromatography and conjugated with biotin under optimal conditions.
- 0.5 mg/ml
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C. Do not freeze.
FC - Quality tested
- Recommended Usage
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 ≤0.25 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.
- Application Notes
RM4-4 antibody does not block the binding of GK1.5 and RM4-5 antibodies to CD4 T cells. For immunohistochemistry applications, the RM4-5 (Cat. No. 100506) and GK1.5 (Cat. No. 100402) antibodies are recommended.
(PubMed link indicates BioLegend citation)
- Bendelac A. 1995. Curr. Opin. Immunol. 7:367.
- Norian LA and Allen PM. 2004. J. Immunol. 173:835.
- Product Citations
AB_2561504 (BioLegend Cat. No. 116010)
- Ig superfamily, 55 kD
Majority of thymocytes, T cell subset
- TCR co-receptor, T cell activation
- MHC class II molecule
- Cell Type
- T cells, Thymocytes, Tregs
- Biology Area
- Molecular Family
- CD Molecules
- Antigen References
1. Barclay A, et al. 1997. The Leukocyte Antigen FactsBook Academic Press.
2. Bierer BE, et al. 1989. Annu. Rev. Immunol. 7:579.
3. Janeway CA. 1992. Annu. Rev. Immunol. 10:645.
- Gene ID
- 12504 View all products for this Gene ID
- View information about CD4 on UniProt.org
- How many biotin molecules are per antibody structure?
- We don't routinely measure the number of biotins with our antibody products but the number of biotin molecules range from 3-6 molecules per antibody.
- 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.
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