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Phospho-CD28 (Tyr191) Antibody
SPA-01896
| Size | Price |
| 25 µg | Online Inquiry |
| 100 µg | Online Inquiry |
| More Options | Online Inquiry |
| Target Information | |
|---|---|
| Target Name | CD28 |
| Gene Abbr. | CD28 |
| Gene ID | 940 |
| Full Name | CD28 molecule |
| Alias | Tp44 |
| Introduction | CD28 is a transmembrane glycoprotein expressed by T cells as well as some other hematopoietic cells. 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. Activation of naïve T cells in the absence of CD28 stimulation can result in a state of T cell anergy, or unresponsiveness. CD28 signals through cytoplasmic phospho-tyrosine motifs that bind several SH2 or SH3 domain-containing proteins involved in T cell activation. 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. Several CD28 isoforms are produced by alternative splicing. |
| Product Details | |
|---|---|
| Host | Rabbit |
| Clonality | Monoclonal |
| Clone No. | E5B9Z |
| Immunogen | Synthetic peptide corresponding to residues surrounding Tyr191 of human CD28 protein. |
| Source/Purification | Antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Tyr191 of human CD28 protein. |
| Usage | |
|---|---|
| Application | WB, IP |
| Dilutions | Western Blot (1:1000); Immunoprecipitation (1:200) |
| MW(KDa) | 40 |
| Reactivity | Human, Mouse |
| Sensitivity | Endogenous |
| Specificity | This antibody recognizes endogenous levels of CD28 protein only when phosphorylated at Tyr191. This antibody shows cross-reactivity with phosphorylated EGFR, ERBB2, and CSF1R, and detects a 70-80 kDa band of unknown origin in some treated cell lines. |
| Storage & Handling | |
|---|---|
| Storage Buffer | 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. |
| Preservative | Less than 0.02% Sodium Azide |
| Storage Temp. | Store at -20 °C. |
| Handling | Do not aliquot the antibody. |
For research use only. Not intended for any clinical use. No products from CD BioSciences may be resold, modified for resale or used to manufacture commercial products without prior written approval from CD BioSciences.