- H129.19 (See other available formats)
- Regulatory Status
- Other Names
- L3T4, T4
- Rat IgG2a, κ
- Ave. Rating
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- Product Citations
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- Antibody Type
- Host Species
- Mouse lymphocytes
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
- The antibody was purified by affinity chromatography, and conjugated with PE/Cyanine5 under optimal conditions.
- 0.2 mg/ml
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. 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 ≤0.06 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.
- Excitation Laser
Blue Laser (488 nm)
Green Laser (532 nm)/Yellow-Green Laser (561 nm)
- Application Notes
Additional reported applications (for the relevant formats) include: blocking of CD4+ T cell activation1-3, depletion
. The LEAF™ purified antibody (Endotoxin <0.1 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays.
- Additional Product Notes
- BioLegend is in the process of converting the name PE/Cy5 to PE/Cyanine5. The dye molecule remains the same, so you should expect the same quality and performance from our PE/Cyanine5 products. Please contact Technical Service if you have any questions.
- Application References
- Naquet P. 1985. Immunogenetics. 22:247-256.
- Pierres A. 1984. J. Immunol.. 132:2775-2782.
- Guo MW. 1995. Zygote. 3:65-73.
- Ghobrial RR. 1989. Clin Immunol Immunopathol. 52:486-506.
- Product Citations
AB_2075572 (BioLegend Cat. No. 130312)
- Ig superfamily, 55 kD
- Majority of thymocytes, T cell subset
- TCR co-receptor, T cell activation
- MHC class II molecule
- Cell Type
- Thymocytes, T cells, 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.
4. Naquet P. 1985. Immunogenetics. 22:247-256.
5. Pierres A. 1984. J. Immunol.. 132:2775-2782.
6. Guo MW. 1995. Zygote. 3:65-73.
7. Ghobrial RR. 1989. Clin Immunol Immunopathol. 52:486-506.
- Gene ID
- 12504 View all products for this Gene ID
- View information about CD4 on UniProt.org
- 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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