- Clone
- RA3-6B2 (See other available formats)
- Other Names
- B220
- Isotype
- Rat IgG2a, κ
- Ave. Rating
- Submit a Review
- Product Citations
- publications

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C57BL/6 mouse frozen lymph node section was fixed with 4% paraformaldehyde (PFA) for 10 minutes at room temperature and blocked with 5% FBS plus 5% rat serum for 1 hour at room temperature. Then the section was stained with 2.5 µg/ml of B220 (clone RA3-6B2) Alexa Fluor® 594 (red), 2.5 µg/ml of CD4 (clone RM4-5) Alexa Fluor® 488 (green), and 2.5 µg/ml of CD8 (clone 53-6.7) Alexa Fluor® 647 (blue) overnight at 4°C. The image was captured by 10X objective. -
C57BL/6 mouse splenocytes were stained with CD45R/B220 (clone RA3-6B2) Alexa Fluor® 594 (filled histogram) or rat IgG2a, κ Alexa Fluor® 594 isotype control (open histogram). The data was acquired by BD LSRFortessa™ cell analyzer equipped with Yellow-Green Laser (561 nm). -
Formalin-fixed, 300 micron-thick mouse spleen section was blocked, permeabilized and stained overnight with CD4 (clone RM4-5) Alexa Fluor® 647 (red), CD169 (Siglec-1)(clone 3D6.112) Alexa Fluor® 488 (green), and CD45R/B220 (clone RA3-6B2) Alexa Fluor® 594 (blue) all at 5 µg/mL, optically cleared, then analyzed at 220 μm imaging depth on a confocal microscope. Watch the video.
Cat # | Size | Price | Quantity Avail. | Save | ||
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103254 | 100 µg | 215 CHF |
CD45R, also known as B220, is an isoform of CD45. It is a member of the protein tyrosine phosphatase (PTP) family with a molecular weight of approximately 180-240 kD. CD45R is expressed on B cells (at all developmental stages from pro-B cells through mature B cells), activated B cells, and subsets of T and NK cells. CD45R (B220) is also expressed on a subset of abnormal T cells involved in the pathogenesis of systemic autoimmunity in MRL-Faslpr and MRL-Fasgld mice. It plays a critical role in TCR and BCR signaling. The primary ligands for CD45 are galectin-1, CD2, CD3, and CD4. CD45R is commonly used as a pan-B cell marker; however, CD19 may be more appropriate for B cell specificity.
Product DetailsProduct Details
- Reactivity
- Mouse, Human, Cross-Reactivity: Cat (Feline)
- Antibody Type
- Monoclonal
- Host Species
- Rat
- Immunogen
- Abelson murine leukemia virus-induced pre-B tumor cells
- Formulation
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
- Preparation
- The antibody was purified by affinity chromatography and conjugated with Alexa Fluor® 594 under optimal conditions.
- Concentration
- 0.5 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
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IHC-F - Quality tested
FC, 3-D IHC - Verified - Recommended Usage
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Each lot of this antibody is quality control tested by immunofluorescence staining. For immunohistochemistry, a concentration range of 2.5-5 μg/ml is recommended. For immunofluorescence microscopy, a concentration range of 1.25-10 μg/ml is recommended. 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.
* Alexa Fluor® 594 has an excitation maximum of 590 nm, and a maximum emission of 617 nm.
Alexa Fluor® and Pacific Blue™ are trademarks of Life Technologies Corporation.
View full statement regarding label licenses - Application Notes
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Clone RA3-6B2 has been described to react with an epitope on the extracellular domain of the transmembrane CD45 glycoprotein which is dependent upon the expression of exon A and specific carbohydrate residues. Additional reported applications (for the relevant formats) include: immunoprecipitation1, in vitro and in vivo modulation of B cell responses2-4, and immunohistochemistry of acetone-fixed frozen sections and formalin-fixed paraffin-embedded sections5,6.
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Application References
(PubMed link indicates BioLegend citation) -
- Coffman RL. 1982. Immunol. Rev. 69:5. (IP)
- George A, et al. 1994. J. Immunol. 152:1014. (Activ)
- Asensi V, et al. 1989. Immunology 68:204. (Activ)
- Domiati-Saad R, et al. 1993. J. Immunol. 151:5936. (Activ)
- Hata H, et al. 2004. J. Clin. Invest. 114:582. (IHC)
- Monteith CE, et al. 1996. Can. J. Vet. Res. 60:193. (IHC)
- Shih FF, et al. 2006. J. Immunol. 176:3438. (FC)
- Chang C L-T, et al. 2007. J. Immunol. 178:6984.
- Fazilleau N, et al. 2007. Nature Immunol. 8:753.
- Lang GL, et al. 2008. Blood 111:2158. PubMed
- Charles N, et al. 2010. Nat. Med. 16:701. (FC) PubMed
- del Rio ML, et al. 2011. Transpl. Int. 24:501. (FC) PubMed
- Murakami R, et al. 2013. PLoS One. 8:73270. PubMed
- Product Citations
- RRID
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AB_2563229 (BioLegend Cat. No. 103254)
Antigen Details
- Structure
- Protein tyrosine phosphatase (PTP) family, 180-240 kD
- Distribution
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B cells, T cell subset, NK cell subset
- Function
- Phosphatase, T and B cell activation
- Ligand/Receptor
- Galectin-1, CD2, CD3, CD4
- Cell Type
- B cells, NK cells, T cells
- Biology Area
- Cell Biology, Immunology, Inhibitory Molecules, Neuroscience, Neuroscience Cell Markers
- Molecular Family
- CD Molecules
- Antigen References
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1. Barclay A, et al. 1997. The Leukocyte Antigen FactsBook Academic Press.
2. Trowbridge IS, et al. 1993. Annu. Rev. Immunol. 12:85.
3. Kishihara K, et al. 1993. Cell 74:143.
4. Pulido R, et al. 1988. J. Immunol. 140:3851. - Gene ID
- 19264 View all products for this Gene ID 5788 View all products for this Gene ID
- UniProt
- View information about CD45R on UniProt.org
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