品牌:CST,产品名称:CD28 (D2Z4E) Rabbit mAb #38774 英文名称:CD28 (D2Z4E) Rabbit mAb Product name:CD28 (D2Z4E) Rabbit mAb #38774 Isotype:Rabbit IgG Sensitivity:Endogenous Applications:WB , IP , Purification: Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro208 of human CD28 protein. Background: CD28 is a transmembrane glycoprotein expressed by T cells as well as some other hematopoietic cells (1, 2). T cell activation requires T cell receptor (TCR) recognition of antigen presented in the context of MHC molecules. CD28 acts as a T cell costimulatory receptor, and interaction of CD28 with its ligands CD80 or CD86 provides the second signal required for naïve T cell activation (3-5). Activation of naïve T cells in the absence of CD28 stimulation can result in a state of T cell anergy, or unresponsiveness (3). CD28 signals through cytoplasmic phospho-tyrosine motifs that bind several SH2 or SH3 domain-containing proteins involved in T cell activation (2). Recently, CD28 was demonstrated to be a preferred target of PD-1-mediated dephosphorylation. Consistently, CD28 expression was required for T cell proliferation following PD-1 blockade and CD28 stimulation was required for effective anti-PD-1 cancer immunotherapy in mice (6, 7). Several CD28 isoforms are produced by alternative splicing (8).
CD28 (D2Z4E) Rabbit mAb recognizes endogenous levels of total CD28 protein and is predicted to react with multiple CD28 isoforms that are produced through alternative splicing. This antibody cross-reacts with 16 kDa and 100 kDa proteins of unknown origin in some mouse cells.
Species Reactivity:
Human, Mouse
Application
Dilutions
Western Blotting
1:1000
Immunoprecipitation
1:50
Storage:
Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.