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Phosphate-buffered solution, pH 7.2, containing no preservative. 0.2 µm filter sterilized. Endotoxin level is < 0.1 EU/µg of the protein (< 0.01 ng/µg of the protein) as determined by the LAL test.
Preparation:
The LEAF™ (Low Endotoxin, Azide-Free) antibody was Purified by affinity chromatography.
Concentration:
1.0 mg/ml
Storage & Handling:
The antibody solution should be stored undiluted at 4 °C. This LEAF™ solution contains no preservative; handle under aseptic conditions.
Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For immunofluorescent staining, the suggested use of this reagent is ≤1.0 µg per million cells in 100 µl volume or 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.
COA:
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 sterile-filtered) is recommended for functional assays.
Application References:
1. Naquet P. 1985. Immunogenetics. 22:247. 2. Pierres A. 1984. J. Immunol.. 132:2775. 3. Guo MW. 1995. Zygote. 3:65. 4. Ghobrial RR. 1989. Clin Immunol Immunopathol. 52:486.
Description:
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, a subset of T cells, and weakly on macrophages and dendritic cells. It acts as a coreceptor with the TCR during T cell activation and thymic differentiation by binding MHC class II and associating with the protein tyrosin kinase, lck. The H129.19 antibody is able to block CD4 mediated cell adhesion and T cell activation. It is also useful for in vivo and in vitro depletion of CD4+ T cells. H129.19 antibody blocks binding of the anti-mouse CD4 mAbs GK1.5 and RM4-5, but not RM4-4 antibody. H129.19 antibody inhibits various responses of T helper cells to antigenic or mitogenic stimuli.
Other Names:
L3T4, T4
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
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.
*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, www.biolegend.com/terms). BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.
