CD28 Antibody (39482)

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Product Details

Summary
Product Discontinued
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Order Details


    • Catalog Number
      NB100-65334
    • Availability
      Product Discontinued

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CD28 Antibody (39482) Summary

Immunogen
Chicken embryonic thymocytes
Specificity
Clone 2-4 (NB100-65334) was originally reported to recognize avian CD2, but has subsequently been found to recognize the 40kDa chicken CD28 homologue (2). In chickens CD28 is expressed by all T cells excluding T cells that are gamma/delta positive. Studies suggest that the co-stimulatory role of CD28 is important to T cell function in chickens.
Isotype
IgG2a
Clonality
Monoclonal
Host
Mouse
Gene
CD28
Purity
Protein G purified
Innovator's Reward
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Applications/Dilutions

Dilutions
  • Flow Cytometry 1:25-1:50
  • Immunohistochemistry 1:10-1:500
  • Immunohistochemistry-Frozen 1:10-1:500
  • Immunoprecipitation 1:10-1:500

Reactivity Notes

Reacts with Chicken. Cross reacts with Duck.

Packaging, Storage & Formulations

Storage
Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
Buffer
PBS (pH 7.4)
Preservative
0.09% Sodium Azide
Concentration
1.0 mg/ml
Purity
Protein G purified

Alternate Names for CD28 Antibody (39482)

  • CD28 antigen (Tp44)
  • CD28 antigen
  • CD28 molecule
  • CD28
  • MGC138290
  • T-cell-specific surface glycoprotein CD28
  • Tp44

Background

Human CD28 antigen is a 44 kDa disulfide linked homodimeric T cell specific surface glycoprotein. It is a cell adhesion molecule of the immunoglobulin superfamily which is constitutively expressed on most peripheral blood T lymphocytes (approximately 95% of CD4+ cells and 50% of CD8+ cells). Mature thymocytes exhibit higher levels of CD28 than the immature cells. Activation of T cells results in enhanced CD28 expression. T cell activation requires two combined signals provided by antigen presenting cells. The first is mediated via the T cell receptor following its interaction with antigenic peptide MHC complexes, and the second is delivered by accessory or costimulating molecules through their counter receptors on T lymphocytes. CD28 bears structural homology to CTLA 4 which is expressed at very low levels on the surface of CD4+ and CD8+ peripheral blood cells only following activation. CD28 is the natural receptor for the B7/BB 1 ligand (CD80) a 55-60 kDa glycoprotein which is expressed on activated B lymphocytes, on dendritic cells and on interferon gamma treated monocytes. The binding of B7 1/BB 1 molecules to CD28 is involved in T lymphocyte activation and in the initiation and maintenance of chronic inflammation.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Blogs on CD28.

Thomson Reuters Predicts 2016 Nobel Prize Winners
Here at Bio-Techne we always look forward to the annual announcements of winners of the highly coveted Nobel Prize – the greatest award in science. How can you go about predicting which scientists might be in line for a life-changing phone-call fro...  Read full blog post.

CD80: A co-stimulator of T cell activation
CD80 is a 60kD single chain type I transmembrane glycoprotein that is a member of the immunoglobulin family. CD80 is expressed on activated B- and T-lymphocytes, as well as a subpopulation of previously activated B-cells, but not on the majority of re...  Read full blog post.

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Bioinformatics

Gene Symbol CD28
Entrez
Uniprot