CD28 Antibodies

The CD28 antigen (Tp44) is a homodimer of disulfide-linked chains, with a molecular weight of 44 kDa each. It is involved in the interaction of T lymphocytes with antigen-presenting cells (APCs), through its counter-receptors, B7-1/BB-1 (CD80) and B7-2/B70 (CD86). It provides a major co-stimulatory signal for T cell activation, proliferation and lymphokine production. The CD28 family of receptors (CD28, CTLA-4, ICOS, PD-1 and BTLA) plays a critical role in controlling the adaptive immune response. The CD28 receptor can enhance T cell antigen receptor (TCR) signals, as well as deliver independent signals. Although the signals through CD28 are crucial for the initial co-stimulation of interleukin-2 (IL-2) production, a TCR-independent CD28 signal leads to the selective transcription of survival, but not proliferative genes. CD28 is expressed by a majority of CD3+ T lymphocytes. CD4+ T lymphocytes express the CD28 antigen more frequently than do CD8+ T lymphocytes. CD28 antigen is also present on plasma cells and thymocytes.

Clone: CD28.2 Isotype: IgG1 Mouse

The CD28.2 monoclonal antibody costimulates T cell proliferation and cytokine production in the presence of T cell activators (αCD3, PMA, SEB). It inhibits proliferation of CD4+ T lymphocytes. It cross-reacts with Rhesus monkey peripheral blood lymphocytes.

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Product Line Specifications

Format Liquid
Specificity CD28
Form PC5.5
Clone CD28.2
Isotype IgG1 Mouse
Target Species Human
Flow Product Line IOTest
Item Specifications Referenced B24027

The specifications above are not representative of all reagents but only to the item/part number referenced in this Product Line Specifications table. Please view a product's detail page to view all product specifications for that particular reagent. 

Technical Documents