Purified Anti-Human CD28 Antibody[CD28.2]

CD28

CD28 is a 44 kD disulfide-linked homodimeric type I glycoprotein. It is a member of the immunoglobulin superfamily and is also known as T44 or Tp44. CD28 is expressed on most T lineage cells, NK cell subsets, and plasma cells. CD28 binds both CD80 and CD86 using a highly conserved motif MYPPY in the CDR3-like loop. CD28 is considered a major co-stimulatory molecule, inducing T lymphocyte activation and IL-2 synthesis, and preventing cell death. In vitro studies indicate that ligation of CD28 on T cells by CD80 and CD86 on antigen presenting cells provides a costimulatory signal required for T cell activation and proliferation.

Phosphate buffered solution, pH 7.2, containing 0.09% stabilizer.

0.5 mg/mL

Unconjugated

940

PAS2;MNS;HGpMiX;GYPA;GPSAT;

P10747

Each lot of this antibody is quality control tested by flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is < 0.5 ug per 10^6 cells in 100 uL volume or 100 uL of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.