- CD28.2 (See other available formats)
- Other Names
- T44, Tp44
- Mouse IgG1, κ
- Ave. Rating
- Submit a Review
- Product Citations
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CD28 is a 44 kD disulfide-linked homodimeric type I glycoprotein. It is a member of the immunoglobulin superfamily and is also known as T44 or Tp44. CD28 is expressed on most T lineage cells, NK cell subsets, and plasma cells. CD28 binds both CD80 and CD86 using a highly conserved motif MYPPY in the CDR3-like loop. CD28 is considered a major co-stimulatory molecule, inducing T lymphocyte activation and IL-2 synthesis, and preventing cell death. In vitro studies indicate that ligation of CD28 on T cells by CD80 and CD86 on antigen presenting cells provides a costimulatory signal required for T cell activation and proliferation.Product Details
- Human, Baboon, Capuchin Monkey, Chimpanzee, Cynomolgus, Pigtailed Macaque, Rhesus, Sooty Mangabey, Squirrel Monkey
- Antibody Type
- Host Species
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and 1 mM EDTA.
- The antibody was purified by chromatography and conjugated with TotalSeq™-A oligomer under optimal conditions. The solution is free of unconjugated DNA and unconjugated antibody.
- 0.5 mg/ml
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C. Do not freeze.
PG - Quality tested
- Recommended Usage
Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis and the oligomer sequence is confirmed by sequencing. For Proteogenomics TotalSeq™-A analysis, 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.
To maximize performance, centrifuge the antibody dilution (1.0 µg of antibody in 100 µl of staining buffer for every 1 million cells) before adding to the cells at 14,000xg at 2 - 8°C for 10 minutes. Carefully pipette out the liquid avoiding the bottom of the tube and add to the cell suspension.
Buyer is solely responsible for determining whether Buyer has all intellectual property rights that are necessary for Buyer's intended uses of the BioLegend TotalSeq™ products. For example, for any technology platform Buyer uses with TotalSeq™, it is Buyer's sole responsibility to determine whether it has all necessary third party intellectual property rights to use that platform and TotalSeq™ with that platform.
- Application Notes
Additional reported applications (for the relevant formats) include: immunoprecipitation, immunohistochemical staining of acetone-fixed frozen tissue sections4, and in vitro T cell costimulation5-8. This clone was tested in-house and does not work on formalin fixed paraffin-embedded (FFPE) tissue. The CD28.2 antibody co-stimulates T cell proliferation and cytokine production in the presence of suboptimal amounts of anti-CD3 antibody. The LEAF™ purified antibody (Endotoxin <0.1 EU/μg, Azide-Free, 0.2 μm filtered) is recommended for functional assays (Cat. No. 302914). For highly sensitive assays, we recommend Ultra-LEAF™ purified antibody (Cat. No. 302934) with a lower endotoxin limit than standard LEAF™ purified antibodies (Endotoxin <0.01 EU/µg).
- Additional Product Notes
TotalSeq™ reagents are designed to profile protein expression at a single cell level following an optimized protocol similar to the CITE-seq workflow. A compatible single cell device (e.g. 10x Genomics Chromium System and Reagents) and sequencer (e.g. Illumina analyzers) are required. Please contact technical support for more information, or visit biolegend.com/totalseq.
The TotalSeq™-A barcode sequence associated with clone CD28.2 is TGAGAACGACCCTAA.
The flanking sequences are CCTTGGCACCCGAGAATTCCA, and the capture sequence, BAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA*A*A, B represents either C, G, or T, and * indicates a phosphorothioated bond, to prevent nuclease degradation.
The full oligomer sequence for this product, with the specific barcode in brackets is CCTTGGCACCCGAGAATTCCA [TGAGAACGACCCTAA]BAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA*A*A.
(PubMed link indicates BioLegend citation)
- Schlossman S, et al. Eds. 1995. Leucocyte Typing V. Oxford University Press. New York.
- Nunes J, et al. 1993. Biochem. J. 293:835.
- Calea-Lauri J, et al. 1999. J. Immunol. 163:62.
- Tazi A, et al. 1999. J. Immunol. 163:3511. (IHC)
- Marti F, et al. 2001. J. Immunol. 166:197. (Costim)
- Jeong SH, et al. 2004. J. Virol. 78:6995. (Costim)
- Rivollier A, et al. 2004. Blood 104:4029. (Costim)
- Scharschmidt E, et al. 2004. Mol. Cell Biol. 24:3860. (Costim)
- Sheng W, et al. 2007.Elsevier 580:6819. PubMed
- Mitsuhashi M. 2007. Clin Chem.53:148. PubMed
- Ye Z, et al. 2008. Infect. Immun. 76:2541. PubMed
- Magatti M, et al. 2008. Stem Cells 26:182. (FA) PubMed
- Yoshino N, et al. 2008. Exp. Anim. (Tokyo) 49:97. (FC)
- Berg M, et al. 2008. J Leukoc Biol. 83:853. (IP) PubMed
- Rout N, et al. 2010. PLoS One 5:e9787. (FC)
- Leonard JA, et al. 2011. J. Virol. 85:6867. PubMed
- Nomura T, et al. 2012. J. Virol. 86:6481. PubMed
AB_2783159 (BioLegend Cat. No. 302955)
- Ig superfamily, type I transmembrane glycoprotein, homodimer, 44 kD
Mature T cells, thymocytes, NK cell subsets, plasma cells, EBV-positive B cells
- T cell costimulation
- Ligand Receptor
- CD80, CD86
- Cell Type
- B cells, NK cells, Plasma cells, T cells, Thymocytes, Tregs
- Biology Area
- Molecular Family
- CD Molecules
- Antigen References
1. Schlossman S, et al. Eds. 1995. Leucocyte Typing V. Oxford University Press. New York.
2. June CH, et al. 1994. Immunol. Today 15:321.
3. Linskey PS, et al. 1993. Annu. Rev. Immunol. 11:191.
- Gene ID
- 940 View all products for this Gene ID
- View information about CD28 on UniProt.org
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