Mouse CD28 Antibody

(1 citations)   
  • Species Reactivity
    Mouse
  • Specificity
    Detects mouse CD28 in ELISA.
  • Source
    Monoclonal Rat IgG1 Clone # 794716
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant mouse CD28
    Accession # P31041
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Endotoxin Level
    <0.10 EU per 1 μg of the antibody by the LAL method.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Flow Cytometry
    0.25 µg/106 cells
    See below
  • Agonist Activity
    0.07-0.42 µg/mL
    See below
  • CyTOF-ready
    Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Mouse CD28 AntibodyInduces Proliferation inMouse T Cells. Rat Anti-Mouse CD28Monoclonal Antibody (Catalog # MAB4832) induces proliferation in mouse T cells in the presence of 100 ng/mL Hamster Anti-Mouse CD3 epsilon Monoclonal Antibody (Catalog # MAB484), in adose dependentmanner, asmeasured by Resazurin (Catalog # AR002), The ED50 for this effectis typically
0.07-0.42μg/mL.
Detection of CD28 in CD3+ Mouse Splenocytes by Flow Cytometry. CD3+ mouse splenocytes were stained with Rat Anti-Mouse CD28 Monoclonal Antibody (Catalog # MAB4832, filled histogram) or isotype control antibody (Catalog # MAB005, open histogram), followed by Phycoerythrin-conjugated Anti-Rat IgG Secondary Antibody (Catalog # F0105B).
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.5 mg/mL in sterile PBS.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: CD28

CD28 and CTLA-4, together with their ligands B7-1 and B7-2, constitute one of the dominant costimulatory pathways that regulate T and B cell responses. CD28 and CTLA-4 are structurally homologous molecules that are members of the immunoglobulin (Ig) gene superfamily. Both CD28 and CTLA-4 are composed of a single Ig
V‑like extracellular domain, a transmembrane domain and an intracellular domain. CD28 and CTLA-4 are both expressed on the cell surface as disulfide-linked homodimers or as monomers. The genes encoding these two molecules are closely linked on human chromosome 2 and mouse chromosome 1. Mouse CD28 is expressed constitutively on virtually 100% of mouse T cells and on developing thymocytes. Cell surface expression of mouse CD28 is down-regulated upon ligation of CD28 in the presence of PMA or PHA. In contrast, CTLA-4 is not expressed constitutively but is upregulated rapidly following T cell activation and CD28 ligation. Cell surface expression of CTLA-4 peaks approximately 48 hours after activation. Although both CTLA-4 and CD28 can bind to the same ligands, CTLA-4 binds to
B7‑1 and B7‑2 with a 20-100 fold higher affinity than CD28. CD28/B7 interaction has been shown to prevent apoptosis of activated T cells via the up-regulation of
Bcl‑xL. CD28 ligation has also been shown to regulate Th1/Th2 differentiation. Agonist activity has been reported using MAB4831 (4,5).

  • References:
    1. Lenschow, D.J. et al. (1996) Annu. Rev. Immunol. 14:233.
    2. Hathcock, K.S. and R.J. Hodes (1996) Advances in Immunol. 62:131.
    3. Ward, S.G. (1996) Biochem. J. 318:361.
    4. Nguyen, P. et al. (2003) Blood 13:4320.
    5. Orbach, A. et al. (2007) J. Immunol. 179:7287.
  • Entrez Gene IDs:
    940 (Human); 12487 (Mouse); 102146670 (Cynomolgus Monkey)
  • Alternate Names:
    CD28 antigen (Tp44); CD28 antigen; CD28 molecule; CD28; MGC138290; T-cell-specific surface glycoprotein CD28; Tp44
Related Research Areas
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citations: Showing 1 - 1

  1. The excretory-secretory products of Echinococcus granulosus protoscoleces directly regulate the differentiation of B10, B17 and Th17 cells
    Authors: W Pan, WT Hao, YJ Shen, XY Li, YJ Wang, FF Sun, JH Yin, J Zhang, RX Tang, JP Cao, KY Zheng
    Parasit Vectors, 2017;10(1):348.
    Species: Mouse
    Sample Type: Whole Cells
    Application: Functional Assay
Isotype Controls
Description Application Cat# Citations Images  

Rat IgG1 Isotype Control

Ctrl MAB005 37  
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Normal Rat IgG Control

Ctrl 6-001-A 9
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Normal Rat IgG Control (Azide Free)

Ctrl 6-001-F 1
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Rat IgG1 Isotype Control

Ctrl MAB005R
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Secondary Antibodies
Description Application Cat# Citations Images  

Rat IgG HRP-conjugated Antibody

WB, Simple Western HAF005 7  
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Goat Anti-Rat IgG NorthernLights™ NL557-conjugated Antibody

Flow, IHC, ICC NL013 2
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Goat Anti-Rat F(ab)2 IgG (H+L)
APC-conjugated Antibody

Flow F0113 2  
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Rat F(ab)2 IgG (H+L) PE-conjugated Antibody

Flow F0105B 2  
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Goat Anti-Rat IgG NorthernLights™ NL493-conjugated Antibody

Flow, IHC, ICC NL015 1
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Goat Anti-Rat IgG Biotinylated Antibody

WB BAF005 2
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Goat Anti-Rat IgG Antibody

WB AF005 1
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Rat IgG VisUCyte HRP Polymer Antibody

IHC VC005  
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Rat F(ab)2 IgG (H+L) Fluorescein-conjugated Antibody

Flow F0104B  
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Goat Anti-Rat IgG NorthernLights™ NL637-conjugated Antibody

Flow, IHC, ICC NL014
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Goat Anti-Rat F(ab)2 IgG (H+L) PerCP-conjugated Antibody

Flow F0115 1
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