Staining of BALB/c thymocytes with Anti-Mouse CD4 FITC (cat. 11-0041) and 0.5 µg of Rat IgG2b κ Isotype Control PE (cat. 12-4031) (left) or 0.5 µg of Anti-Mouse CD184 (CXCR4) PE (right). Total viable cells were used for analysis.
Contents: Anti-Mouse CD184 (CXCR4) PE Catalog Number: 12-9991 Concentration: 0.2 mg/ml Formulation: Phosphate buffered saline, pH 7.2, less than or equal to 0.09% NaN3 Storage Conditions: Store at 2-8°C. Do not freeze. Light sensitive material. Clone: 2B11 Host/Isotype: Rat IgG2b, κ
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12-9991-81
50 ug
12-9991-82
100 ug
Note: Several countries will continue to be supplied via distributors. Country specific prices may apply.
*Functional Grade™ (FG™) Purified: Azide-free, sterile-filtered, and endotoxin < 0.001 ng/µg (unless otherwise noted). *Functional Grade™ (FG™) Biotin: Azide-free, sterile-filtered, and endotoxin < 0.05 ng/µg. Purified: Contains azide, not sterile-filtered, and not endotoxin tested.
Flow Cytometry Product Notes: Test Sizes: To accommodate multicolor flow cytometry, eBioscience is in the process of reducing test size volumes from 20 µL to 5 µL. Please check your antibody vial for the recommended test size. Fluorochrome Replacements: eBioscience is in the process of replacing all Alexa Fluor® 647 conjugated products with eFluor® 660 conjugated products.
Description
The 2B11 monoclonal antibody reacts with mouse and human CXCR4, also known as CD184, Fusin, LESTR, or HUMSTR. Fusin is a member of the G-protein-coupled chemokine receptor family with seven membrane-spanning domains, and functions as a coreceptor for X4 HIV-1 entry into CD4+ cells. In addition it has been shown to play a role in lymphocyte migration. The ligand for CXCR4 is SDF1. CXCR4 is required for maintenance of granulocyte progenitors in the bone marrow and essential for B cell development. Expression of CXCR4 is different between mice and human. In the thymus CXCR4 is restricted to CD4+CD8+ cells while in the spleen predominant expression is found on B lymphocytes.
The monoclonal antibody 2B11 recognizes the amino terminus of CXCR4 and has been reported to have functional activity; it does not block SDF1a but causes internalization of the receptor.
Applications Reported
For research use only, not for diagnostic or therapeutic use. This 2B11 antibody has been reported for use in flow cytometric analysis.
Applications Tested
This 2B11 antibody has been tested by flow cytometric analysis of mouse thymocytes. This can be used at less than or equal to 1 μg per test. A test is defined as the amount (μg) of antibody that will stain a cell sample in a final volume of 100 µL. Cell number should be determined empirically but can range from 105 to 108 cells/test. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest. It is recommended that the incubation time with 2B11 antibody by at least 45 minutes for optimal staining.
References
Forster R, Kremmer E, Schubel A, Breitfeld D, Kleinschmidt A, Nerl C, Bernhardt G, Lipp M. Intracellular and surface expression of the HIV-1 coreceptor CXCR4/fusin on various leukocyte subsets: rapid internalization and recycling upon activation.
J Immunol. 1998 Feb 1;160(3):1522-31. (2B11, FC, WB, FA, PubMed)
Schabath R, Muller G, Schubel A, Kremmer E, Lipp M, Forster R. The murine chemokine receptor CXCR4 is tightly regulated during T cell development and activation.
J Leukoc Biol. 1999 Dec;66(6):996-1004.(2B11, FC, WB PubMed)
Stumm RK, Rummel J, Junker V, Culmsee C, Pfeiffer M, Krieglstein J, Hollt V, Schulz S. A dual role for the SDF-1/CXCR4 chemokine receptor system in adult brain: isoform-selective regulation of SDF-1 expression modulates CXCR4-dependent neuronal plasticity and cerebral leukocyte recruitment after focal ischemia.
J Neurosci. 2002 Jul 15;22(14):5865-78. (2B11, WB, PubMed)