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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. It is recommended that the reagent be titrated for optimal performance for each application.
COA:
Application Notes:
The UC10-4B9 antibody can enhance T cell co-stimulation by blocking CTLA-4 interactions with the B7 co-receptors, favoring CD28 interactions. Additional reported applications (for the relevant formats) include: immunoprecipitation1, in vitro stimulation, in vitro and in vivo blocking1-4 of ligand binding, and as ELISA capture antibody5. To reduce non-specific binding to cells bearing Fc-receptors, pre-incubation of cells with anti-mouse CD16/CD32, clone 93 (Cat. No. 101301/101302), is recommended prior to immunofluorescent staining. For most successful immunofluorescent staining results, it may be important to maximize signal over background by using a relatively bright fluorochrome-antibody conjugate (Cat. No. 106306) or by using a high sensitivity, three-layer staining technique (e.g., including a biotinylated anti-Armenian hamster IgG (Cat. No. 405501) second step, followed by SAv-PE (Cat. No. 405204)). The LEAF™ purified antibody (Endotoxin <0.1 EU/μg, Azide-Free, 0.2 μm sterile-filtered) is recommended for functional assays (Cat. No. 106308).
Application References:
1. Walunas TL, et al. 1994. Immunity 1:405. (Block IP) 2. Cilio CM, et al. 1998. J. Exp. Med. 188:1239. (Block) 3. Issazadeh S, et al. 1999. J. Immunol. 162:761. (Block) 4. McCoy K, et al. 1997. J. Exp. Med. 186:183. (Block) 5. Hsu HC, et al. 2007. J. Immunol. 178:5357. (ELISA Capture) 6. Sugita S, et al. 2010. Invest. Ophthalmol. Vis. Sci. 51:5783. PubMed
Description:
CD152, also known as CTLA-4 or Ly-56, is a 33 kD member of the immunoglobulin superfamily. It is expressed on activated T and B lymphocytes. CD152 is similar to CD28 in amino acid sequence, structure, and genomic organization and these two receptors share common B7 family counter-receptors (B7-1, B7-2). Whereas CD28 delivers a costimulatory signal in T cell activation, CTLA-4 negatively regulates cell-mediated immune responses. CD152 is thought to play a role in the induction and maintenance of immunological tolerance as well as the development of protective immunity and thymocyte regulation.
Other Names:
Cytotoxic T Lymphocyte-Associated Antigen-4 (CTLA-4), Ly-56
Structure:
Ig superfamily, 33 kD
Distribution:
Activated T and B cells
Function:
Negative regulator of T cell activation
Ligand Receptor:
CD80 (B7-1), CD86 (B7-2)
Antigen References:
1. Barclay A, et al. 1997. The Leukocyte Antigen FactsBook Academic Press. 2. Allison JP, et al. 1995. Science 270:932. 3. Waterhouse P, et al. 1995. Science 270:985. 4. Linsley PS, et al. 1991. J. Exp. Med. 174:561.
*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.
