- Clone
- RM4-5 (See other available formats)
- Regulatory Status
- RUO
- Other Names
- L3T4, T4
- Isotype
- Rat IgG2a, κ
- Ave. Rating
- Submit a Review
- Product Citations
- publications
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 co-receptor with the TCR during T cell activation and thymic differentiation by binding MHC class II and associating with the protein tyrosine kinase lck.
Product DetailsProduct Details
- Verified Reactivity
- Mouse
- Antibody Type
- Monoclonal
- Host Species
- Rat
- Immunogen
- BALB/c mouse thymocytes
- Formulation
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide
- Preparation
- The antibody was purified by affinity chromatography and conjugated with Spark Red™ 718 under optimal conditions.
- Concentration
- 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.
- Application
-
FC
- Recommended Usage
-
Flexi-Fluors™ are provided at a standard 0.2 mg/mL concentration. We recommend titrating this reagent to determine the optimal concentration for each application. For many flow cytometry applications, conjugated antibodies perform well at concentrations ranging from 0.03 to 1.0 µg per million cells in 100 µL. We recommend testing a range of concentrations starting from 10 µg/mL.
For example, make five 1:1 serial dilutions of the 0.2 mg/mL antibody. Add 5 µL of each dilution (including the undiluted antibody) to 100 µL of cells (at 107 cells/mL) to test six concentrations -- 1.0, 0.5, 0.25, 0.125, 0.06, and 0.03 µg per million cells in 100 µL volume. Compare staining patterns or create a titration curve using the MFI or staining index to determine the optimal concentration. - Excitation Laser
-
Red Laser (633 nm)
- Application Notes
-
The RM4-5 antibody blocks the binding of GK1.5 antibody and H129.19 antibody to CD4+ T cells, but not RM4-4 antibody. Additional reported applications (for the relevant formats) include: blocking of ligand binding, in vivo depletion of CD4+ cells1, and immunohistochemistry of acetone-fixed frozen tissue sections2,3,11 and paraffin-embedded sections11. Clone RM4-5 is not recommended for immunohistochemistry of formalin-fixed paraffin sections. Instead, acetone frozen or zinc-fixed paraffin sections are recommended. The Ultra-LEAF™ Purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 100575 and 100576).
- Additional Product Notes
-
For more information about Flexi-Fluors™, visit our Flexi-Fluor™ page and review FAQs associated with this product line.
-
Application References
(PubMed link indicates BioLegend citation) -
- Kruisbeek AM. 1991. In Curr. Protocols Immunol. pp. 4.1.1-4.1.5. (Block, Deplete)
- Nitta H, et al. 1997. Cell Vision 4:73. (IHC)
- Fan WY, et al. 2001. Exp. Biol. Med. 226:1045.
- Muraille E, et al. 2003. Infect. Immun. 71:2704. (IHC)
- León-Ponte M, et al. 2007. Blood 109:3139. (FC)
- Bourdeau A, et al. 2007. Blood doi:10.1182/blood-2006-08-044370. (FC)
- Matsumoto M, et al. 2007.J. Immunol.178:2499. PubMed
- Shigeta A, et al. 2008. Blood 112:4915. PubMed
- Zaborsky N, et al. 2010. J. Immunol. 184:725. PubMed
- Rodrigues-Manzanet R, et al. 2010. P. Natl Acad Sci USA 107:8706. PubMed
- Whiteland JL, et al. 1995. J. Histochem. Cytochem. 43:313. (IHC)
- RRID
-
AB_3106357 (BioLegend Cat. No. 285103)
Antigen Details
- Structure
- Ig superfamily, 55 kD
- Distribution
-
Majority of thymocytes, T cell subset
- Function
- TCR co-receptor, T cell activation
- Ligand/Receptor
- MHC class II molecule
- Cell Type
- Dendritic cells, T cells, Thymocytes, Tregs
- Biology Area
- Immunology
- 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
- 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.
- What are Flexi-Fluors?
-
Flexi-Fluors are rapidly made-to-order conjugated antibodies. The technology, manufacturing processes, and specifications used to create Flexi-Fluors are the same as our regular catalog products. However, the optimal concentration and performance of each Flexi-Fluor must be determined by the customer.
- How quickly will I receive my order?
-
We aim to ship Flexi-Fluors within 2-3 weeks of receipt of your order. However, depending on your location, shipping times may vary.
- How are Flexi-Fluors different from regular catalog products?
-
Flexi-Fluors are made on demand, specifically for you. Flexi-Fluors are manufactured using the same high-quality standards, and specifications as other catalog products. For faster delivery, Flexi-Fluors are not tested by flow cytometry to determine optimal concentrations or evaluate performance. This testing needs to be performed by the customer.
- How do I determine the optimal concentration for using my Flexi-Fluor? How should I titrate my antibody?
-
Flexi-Fluors are provided at a standard 0.2 mg/mL concentration. We recommend that you titrate your antibody to determine the optimal concentration to use for your application. For many flow cytometry applications, conjugated antibodies perform well at concentrations ranging from 0.03 to 1.0 µg per million cells in 100 µL volume. We recommend that you test a range of concentrations starting from 10 µg/mL.
For example, make five 1:1 serial dilutions of your 0.2 mg/mL antibody. Add 5 µL of each dilution (including the undiluted antibody) to 100 µL of cells (at 107 cells/ml) to test six concentrations - 1.0, 0.5, 0.25, 0.125, 0.06, and 0.03 µg per million cells in 100 µL volume. Compare staining patterns or create a titration curve using the MFI or staining index to determine the optimal concentration.
- I can’t find the antibody-dye combination that I need. When will it be available?
-
We continuously update our catalog, introducing scores of new products every month. Please get in touch with our Technical Service team for an update on new products or recommendations for suitable alternatives to complete your panel. Or contact Custom Solutions to inquire about our affordable custom conjugation services.
- I need help to validate the performance of my Flexi-Fluor. Who should I contact?
-
Please get in touch with Technical Service for assistance.
- Can I order more than 50 μg of a Flexi-Fluor?
-
Yes, you can order multiple vials of the same Flexi-Fluor products. We cannot guarantee, however, that these vials will be bottled from the same lot. For bulk single-lot orders, contact our Custom Solutions team.
- What is the expiration date of my Flexi-Fluor?
-
Expiration dates can be found on the vial label or by using our CoA lookup tool.
Other Formats
View All CD4 Reagents Request Custom ConjugationCompare 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-mouse CD4
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Biotin anti-mouse CD4
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FITC anti-mouse CD4
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PE anti-mouse CD4
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PE/Cyanine5 anti-mouse CD4
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Purified anti-mouse CD4
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PE/Cyanine7 anti-mouse CD4
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APC/Cyanine7 anti-mouse CD4
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Alexa Fluor® 647 anti-mouse CD4
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Alexa Fluor® 488 anti-mouse CD4
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Pacific Blue™ anti-mouse CD4
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Alexa Fluor® 700 anti-mouse CD4
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PerCP anti-mouse CD4
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PerCP/Cyanine5.5 anti-mouse CD4
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Brilliant Violet 421™ anti-mouse CD4
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APC/Fire™ 750 anti-mouse CD4
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Brilliant Violet 570™ anti-mouse CD4
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Brilliant Violet 605™ anti-mouse CD4
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Brilliant Violet 650™ anti-mouse CD4
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Brilliant Violet 711™ anti-mouse CD4
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Brilliant Violet 785™ anti-mouse CD4
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Brilliant Violet 510™ anti-mouse CD4
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Purified anti-mouse CD4 (Maxpar® Ready)
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PE/Dazzle™ 594 anti-mouse CD4
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TotalSeq™-A0001 anti-mouse CD4
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TotalSeq™-B0001 anti-mouse CD4
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TotalSeq™-C0001 anti-mouse CD4
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Ultra-LEAF™ Purified anti-mouse CD4
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Spark Violet™ 423 anti-mouse CD4 (L3T4) Antibody
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Spark Red™ 718 anti-mouse CD4 (L3T4) (Flexi-Fluor™)
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