CD28 Protein, Human/Cynomolgus, Recombinant (hFc & Avi), Biotinylated is expressed in HEK293 mammalian cells with C-Fc-Avi tag. The predicted molecular weight is 60-90 KDa and the accession number is P10747.
| 説明 |
CD28 Protein, Human/Cynomolgus, Recombinant (hFc & Avi), Biotinylated is expressed in HEK293 mammalian cells with C-Fc-Avi tag. The predicted molecular weight is 60-90 KDa and the accession number is P10747. |
| Species |
Human,Cynomolyus
|
| Expression Host |
HEK293 Cells
|
| Tag |
C-hFc-Avi
|
| Accession Number |
P10747
|
| 別名 |
CD28 molecule, CD28 antigen, CD28, TP44, T-cell-specific surface glycoprotein CD28
|
| Amino Acid |
Asn19-Pro152
|
| Construction |
Asn19-Pro152
|
| Protein Purity |
Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
|
| 分子量 |
60-90 KDa (reducing condition)
|
| Endotoxin |
< 0.1 ng/µg (1 EU/µg) as determined by LAL test.
|
| Formulation |
Lyophilized from a solution filtered through a 0.22 μm filter, containing 20mTris-HCl, 150 mM NaCl, pH 8.0.
|
| Reconstitution |
Reconstitute the lyophilized protein in distilled water. The product concentration should not be less than 100 μg/ml. Before opening, centrifuge the tube to collect powder at the bottom. After adding the reconstitution buffer, avoid vortexing or pipetting for mixing.
|
| Stability & Storage |
Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at-80℃. For reconstituted protein solutions, the solution can be stored at -20°c to -80'c for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots.
|
| Shipping |
In general, Lyophilized powders are shipping with blue ice. Solutions are shipping with dry ice.
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| Research Background |
T-cell-specific surface glycoprotein CD28(CD28) is a single-pass typeI membrane protein which contains one Ig-likeV-type (immunoglobulin-like) domain. It belongs to the immunoglobulin(Ig) superfamily. CD28 is one of the molecules expressed on T cells that provide co-stimulatory signals, which are required for T cell activation.CD28 co-stimulation is necessary for CD4 positive T-cell proliferation and survival, interleukin-2 production, and T-helper type-2 development. Human post-thymic regulatory T cells require CD28 co-stimulation to expand and maintain potent suppressive function in vivo. Apoptosis plays a key role in the age-related decline of CD28 expression and in immunosenescence. CD28 is the receptor for CD80 (B7.1) and CD86 (B7.2). 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. CD28 is the only B7 receptor constitutively expressed on naive T cells.
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