Human CD28 Biotinylated Antibody

  (2 citations)     
Datasheet / CoA / SDS
Product Details
Citations (2)
FAQs
Supplemental Products
Reviews
  • Species Reactivity
    Human
  • Specificity
    Detects human CD28 in Western blots. In this format, less than 1% cross-reactivity with rhCTLA-4 is observed.
  • Source
    Polyclonal Goat IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    S. frugiperda insect ovarian cell line Sf 21-derived recombinant human CD28
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
  • Label
    Biotin
Product Datasheets

Certificate of Analysis Lookup

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Certificate of Analysis Lookup

Certificate of Analysis Request Form

To download a Certificate of Analysis, please enter the catalog and lot numbers in the search box below.

Note: Certificate of Analysis not available for kit components.

Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    0.1 µg/mL
    Recombinant Human CD28 Fc Chimera (Catalog # 342-CD)
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.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.2 mg/mL in sterile PBS.
    Reconstitution Buffer Available
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
  • 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 up-regulated rapidly following T cell activation and CD28 ligation. Cell surface expression of mouse 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 upregulation of bcl-XL. CD28 ligation has also been shown to regulate Th1/Th2 differentiation.

  • 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.
  • 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.

2 Citations: Showing 1 - 2
Filter your results:

Species
Applications
Sample Type
  1. Autoantibodies against CD28 are associated with atopic diseases.
    Authors: Neuber K, Mahnss B, Hubner C, Gergely H, Weichenthal M
    Clin. Exp. Immunol., 2006;146(2):262-9.
    Species: Human
    Sample Type: Recombinant Protein
    Application: WB
  2. A reproducible method for the enumeration of functional (cytokine producing) versus non-functional peptide-specific cytotoxic T lymphocytes in human peripheral blood.
    Authors: Markovic SN, Nevala WK, Uhl CB, Celis E, McKean DJ
    Clin. Exp. Immunol., 2006;145(3):438-47.
    Species: Human
    Sample Type:
    Application: Binding Assay

FAQs

No product specific FAQs exist for this product, however you may

View all Antibody FAQs
Isotype Controls
Description Application Cat# Citations Images  

Normal Goat IgG Biotinylated Control

Ctrl BAF108 19
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Reconstitution Buffers
Description Application Cat# Citations Images  

Reconstitution Buffer 1 (PBS)

RB01
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Staining Reagents
Description Application Cat# Citations Images  

Streptavidin-Alkaline Phosphatase

ELISA(Det) AR001 4
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Streptavidin-Phycoerythrin

Flow F0040 7
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

NorthernLights Streptavidin NL557

Flow , IHC , ICC NL999 4
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Streptavidin-Allophycocyanin

Flow F0050 1
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

NorthernLights Streptavidin NL637

Flow , IHC , ICC NL998 2
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

NorthernLights Streptavidin NL493

Flow , IHC , ICC NL997 2
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Avidin-Fluorescein

Flow F0030 1
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Supplemental Cell Selection Products
Description Application Cat# Citations Images  

MagCellect Streptavidin Ferrofluid

MAG999B 4
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

MagCellect Streptavidin Ferrofluid

MAG999 4
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Supplemental ELISA Products
Description Application Cat# Citations Images  

Streptavidin-HRP

ELISA DY998 51  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

EvenCoat Streptavidin Coated Plates

ELISA CP004
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

EvenCoat Streptavidin Coated Plates, 5 Pack

ELISA CP003 3
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Have you used Human CD28 Biotinylated Antibody?

Submit a review and receive a $25US/€18/£15/$25CAN amazon gift card if you include an image - $10US/€7/£6/$10CAN Amazon card for reviews without an image. Limited to verified customers in USA, Canada and Europe.

Order Details

Contact Us to Order
reload

Feedback

Customer Information
Calculators

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

=
÷

Monoclonal
Antibody
Panels For
Screening

Learn More
Monoclonal Antibodies
R&D Systems Guarantee