PBS pH7.4
12 months from date of receipt / reconstitution, 2 to 8 °C as supplied
应用 | 稀释度 | 推荐种属 |
---|---|---|
FCM | 1:2000 | Hu |
CD28 (Cluster of Differentiation 28) is one of the proteins expressed on T cells that provide co-stimulatory signals required for T cell activation and survival. T cell stimulation through CD28 in addition to the T-cell receptor (TCR) can provide a potent signal for the production of various interleukins (IL-6 in particular). CD28 is the receptor for CD80 (B7.1) and CD86 (B7.2) proteins. When activated by Toll-like receptor ligands, the CD80 expression is upregulated in antigen-presenting cells (APCs). The CD86 expression on antigen-presenting cells is constitutive (expression is independent of environmental factors). It is generally reported, that CD28 is expressed on 50% of CD8+ T cells and more than 80% CD4+ T cells in human, but during the course of activation some T cells lose this molecule. In general, CD28 is a primary costimulatory molecule for T cell activation.
Flow cytometric analysis of human PBMC (human peripheral blood mononuclear cell) labelling Human CD28 antibody at 1/2000 (0.1 μg) dilution (Right) compared with a Mouse monoclonal IgG isotype control (Left). Then cells were stained with CD19 - Brilliant Violet 421™ separately. Gated on total viable cells.