CD45R/B220 Rat anti-Mouse, Biotin, Clone: RA3-6B2, BD

Rat Monoclonal Antibody

Catalog Number	Mfr. No.	Quantity
BDB553085	BD Biosciences 553085	0.1 mg
BDB553086	BD Biosciences 553086	0.5 mg

Description

The RA3-6B2 antibody reacts with an epitope on the extracellular domain of CD45 glycoprotein which is dependent upon the expression of exon A and specific carbohydrate residues. It is expressed on B lyphocytes at all stages from pro-B through mature and activated B cell, but it is decreased on plasma cells and a subset of memory B cells. Levels of expression of CD45R/B220 on the B-cell lineage appear to be developmentally regulated. It is also found on the abnormal T cells involved in the lymphadenopathy of lpr/lpr and gld/gld mutant mice, on lytically active subsets of lymphokine-activated killer cells (NK cells and non-MHC-restricted CTL), on apoptotic T lymphocytes of mice injected with bacterial superantigen, on a population of NK-cell precursors in the bone marrow, and on B-lymphocyte, T-lymphocyte, and macrophage progenitors in fetal liver. The CD45R/B220 antigen is not on hematopoietic stem cells, naive T lymphocytes, or MHC-restricted CTL. CD45 is a member of the Protein Tyrosine Phosphatase (PTP) family: Its intracellular (COOH-terminal) region contains two PTP catalytic domains, and the extracellular region is highly variable due to alternative splicing of exons 4, 5, and 6 (designated A, B, and C, respectively), plus differing levels of glycosylation. The CD45 isoforms detected in the mouse are cell type-, maturation, and activation state-specific. The CD45 isoforms play complex roles in T-cell and B-cell antigen receptor signal transduction. CD45R/B220 is commonly used as a pan B-cell marker; however, CD19 expression, detected by mAb 1D3, is reported to be more restricted to the B-cell lineage. mAb RA3-6B2 has been reported to enhance isotype switching during in vitro B-cell responses and to inhibit in vivo B-cell responses. Cross-reaction of RA3-6B2 mAb with activated human T lymphocytes has been observed. This antibody is routinely tested by flow cytometric analysis. Other applications were tested at BD Biosciences Pharmingen during antibody development only.

Host Species: Rat
Clone: RA3-6B2
Isotype: IgG2a κ
Species Reactivity: Mouse
Immunogen: Mouse Pre-B Tumor

Cell Separation, Flow Cytometry, Immunohistochemistry, Immunohistochemistry (Frozen)

Specifications

• Antigen: CD45R
• Concentration: 0.5mg/mL
• Classification: Monoclonal
• Host Species: Rat
• Research Discipline: Immunology
• Formulation: Aqueous buffered solution containing ≤0.09% sodium azide.
• Isotype: IgG2a κ
• Purification Method: Affinity Purified

• Clone: RA3-6B2
• Applications: Flow Cytometry
• Conjugate: Biotin
• Regulatory Status: RUO
• Target Species: Human, Mouse
• Immunogen: Mouse Pre-B Tumor
• Primary or Secondary: Primary
• Content And Storage: Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.

For Research Use Only.