PRODUCT
Summary
The CD28.2 antibody reacts with human CD28, a 44 kDa type I surface glycoprotein which acts as a co-stimulatory receptor in support of the T cell receptor (TCR). CD28 exists as a homodimer with specificity for two known ligands, known as B7-1 (CD80) and B7-2 (CD86), which are expressed on activated B cells and antigen-presenting cells. These ligands trigger CD28 signaling in concert with TCR activation to drive T cell proliferation, induce high-level expression of IL-2, impart resistance to apoptosis, and enhance T cell cytotoxicity. The interaction / co-stimulatory signaling between the B7 ligands and CD28 provides crucial communication between T cells and B cells or APCs to coordinate the adaptive immune response. Other members of the CD28 family of receptors include CTLA-4 (CD152), PD-1 (CD279), ICOS and BTLA.
APPLICATION
Application Note
*Optimal dilutions/concentrations should be determined by the researcher.
| Application |
Recommended Dilution |
| Assay dependent |
| Assay dependent |
| Assay dependent |
| Assay dependent |
| Assay dependent |
Not tested in other applications.
Calculated MW
Product Note
Recognizes the CD28 (44 kDa) human cell surface disulfide-linked, homodimeric glycoprotein. The antibody reacts with human CD28-transfected murine T-cell hybridoma, PHA-activated blasts and IL-6 dependent plasmacytoma lines. It cross reacts with rhesus monkey PBL. The antibody blocks CD28/B7 (CD80) mediated cell-cell adhesion. It binds to the CDR domain in a CDR1 dependent manner. It enhances CD3 monoclonal antibody-induced T-cell proliferation. May be used in adhesion and co-stimulation studies.
PROPERTIES
Form
Liquid
Buffer
10mM NaH₂PO₄, 150mM NaCl
Preservative
0.09% Sodium azide
Storage
Store as concentrated solution. Centrifuge briefly prior to opening vial. Store at 4ºC.
Concentration
0.5 mg/ml (Please refer to the vial label for the specific concentration.)
Antigen Species
Human
Immunogen
human CD28 transfected murine T cell hybridoma.
Purification
Purified by affinity chromatography
From tissue culture supernatant
Conjugation
Unconjugated
Note
For laboratory research use only. Not for any clinical, therapeutic, or diagnostic use in humans or animals. Not for animal or human consumption.
Purchasers shall not, and agree not to enable third parties to, analyze, copy, reverse engineer or otherwise attempt to determine the structure or sequence of the product.
TARGET
Synonyms
CD28 molecule , Tp44
Cellular Localization
Membrane; Single-pass type I membrane protein
Background
The protein encoded by this gene is essential for T-cell proliferation and survival, cytokine production, and T-helper type-2 development. Several alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jul 2011]
Database
Research Area
REFERENCE
REVIEW
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