Human CD28 is an important costimulatory molecule found on all CD4+ T cells and on about half of the CD8+T cells. T cell activities attributed to CD28 include, prevention of anergy, induction of cytokine gene transcription, stabilization of cytokine mRNAs and activation of CD8+ cytotoxic T lymphocytes. The ligands for CD28, identified as CD80 (B7-1) and CD86 (B7-2), are immunoglobulin superfamily monomeric transmembrane glycoproteins of 60kd and 80kd, respectively. Molecular Structure: A soluble fusion protein consisting of the extracellular (134 aa) domain of human CD28 fused to murine IgG2a Fc (232 aa), with a predicted monomeric molecular weight of 41.8kD. Transfectant Cell Line: CHO Functional Application: CD28-muIg fusion protein blocks binding of anti-human CD28 to human tumor cells. Human CD28-muIg Fusion Protein Applications: Suitable for use in ELISA. Other applications not tested. Recommended Dilution Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4C. For long-term storage, aliquot and store at 4C. Do not freeze. Aliquots are stable for at least 6 months. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Further dilutions can be made in assay buffer.
Molecular Weight:
41.8
Purity:
Purified by Protein A affinity chromatography.
Form:
Supplied as a liquid in FBS, 50mM Sodium Phosphate pH 7.5, 100mM Potassium Chloride, 150mM NaCl.
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