Rat IL-2 ARExSet® antibody pair for ELISA
Key features and details
- Species:
- Size:
- Sample Volume:
- Standard Curve Range:
- Assay type:
- Sensitivity:
- Operation Duration:
- Assay type:
-
Brand:
CAT.NO. : ASER0002
US$ Please choose
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Product Details
Background
Interleukin 2 (IL-2), also known as T cell growth factor (TCGF), is a 15-18 kDa variably glycosylated alpha -helical polypeptide that is a member of the Common gamma Chain ( gamma c) cytokine family. It exists as a monomer and has a notably short half-life (< 30 minutes). Human IL-2 is synthesized as a 153 amino acid (aa) precursor that contains a 20 aa signal sequence plus a 133 aa mature region. The mature region is alpha -helical in nature, and contains one utilized O-linked glycosylation site at Thr3 plus three cysteines, two of which form an intrachain disulfide bond that is essential for activity. Mature human IL-2 shares 73%, 66%, 78% and 97% aa identity with canine, rat, feline and rhesus monkey IL-2, respectively. Although human IL-2 shares only approximately 60% aa identity with the highly polymorphic mouse IL-2, human IL-2 is known to be active on mouse IL-2 responsive cells. Cells reported to secrete IL-2 include gamma δ T cells, activated conventional CD4+ and CD8+ T cells, neurons, microglia, and hematopoietic stem cells.
The receptor for IL-2 (IL-2 R) is composed of three subunits, the 55 kDa CD25/IL-2 R alpha chain, the 70 kDa IL-2 R beta chain, and the 65 kDa Common gamma Chain. IL-2 first binds to CD25, the binary complex then recruits IL-2 R beta and gamma c to form the quaternary signaling complex. In addition to IL-2, IL-2 R beta is used by IL-15 in its quaternary signaling complex. gamma c also serves as a signaling receptor for IL-4, -7, -9, -15, and -21.
In vitro studies have shown an important role for IL-2 in T cell activation and expansion. In vivo, IL-2 is critical for the development, maintenance and function of regulatory T cells (Treg) which provide protection against autoimmune disease. On the other hand, IL-2 can also promote autoimmune inflammation in target organs through its roles in regulating the expression of T cell trafficking genes, and production of Th2 cytokines. Within the CD8+ T cell subset, IL-2 is essential for optimal primary responses and differentiation into terminal effector cells. IL-2 also promotes the development of activated CD8+ T cells into memory cells.
The receptor for IL-2 (IL-2 R) is composed of three subunits, the 55 kDa CD25/IL-2 R alpha chain, the 70 kDa IL-2 R beta chain, and the 65 kDa Common gamma Chain. IL-2 first binds to CD25, the binary complex then recruits IL-2 R beta and gamma c to form the quaternary signaling complex. In addition to IL-2, IL-2 R beta is used by IL-15 in its quaternary signaling complex. gamma c also serves as a signaling receptor for IL-4, -7, -9, -15, and -21.
In vitro studies have shown an important role for IL-2 in T cell activation and expansion. In vivo, IL-2 is critical for the development, maintenance and function of regulatory T cells (Treg) which provide protection against autoimmune disease. On the other hand, IL-2 can also promote autoimmune inflammation in target organs through its roles in regulating the expression of T cell trafficking genes, and production of Th2 cytokines. Within the CD8+ T cell subset, IL-2 is essential for optimal primary responses and differentiation into terminal effector cells. IL-2 also promotes the development of activated CD8+ T cells into memory cells.
Typical data
|
pg/ml |
O.D. |
Average |
Corrected |
|
|
0.00 |
0.0365 |
0.0348 |
0.0357 |
|
|
15.63 |
0.0489 |
0.0510 |
0.0500 |
0.0143 |
|
31.25 |
0.0659 |
0.0634 |
0.0647 |
0.0290 |
|
62.50 |
0.1098 |
0.1073 |
0.1086 |
0.0729 |
|
125.00 |
0.2078 |
0.2248 |
0.2163 |
0.1807 |
|
250.00 |
0.6010 |
0.5297 |
0.5654 |
0.5297 |
|
500.00 |
1.1910 |
1.3020 |
1.2465 |
1.2109 |
|
1000.00 |
3.2510 |
3.1050 |
3.1780 |
3.1424 |
Product Features
- Optimized capture and detection antibody pairings with recommended concentrations save lengthy development time.
- Development protocols are provided to guide further assay optimization.
- Economical alternative to complete kits.
Kit Content
- Capture Antibody
- Detection Antibody
- Recombinant Standard
- Streptavidin conjugated to horseradish-peroxidase (Streptavidin-HRP)
Other Reagents Required
ARExSet® Ancillary Reagent Kit (5 plates): containing 96 well microplates, plate sealers, substrate solution, stop solution, plate coating buffer (PBS), wash buffer, and assay buffer.
- 96 well microplates: AREX Biosciences, Catalog # DSEP01. Plate Sealers: AREX Biosciences, Catalog # DSSF01.
- Coating Buffer: 137 mM NaCl, 2.7 mM KCl, 8.1 mM Na2HPO4, 1.5 mM KH2PO4, pH 7.2-7.4, 0.2 μm fi
ltered . AREX Biosciences, Catalog # DSCB01. - Blocking Buffer: AREX Biosciences, Catalog # DSBB01.
- Wash Buffer: 0.05% Tween 20 in PBS, pH 7.2-7.4. AREX Biosciences, Catalog # DSWB01.
- Assay Buffer: 0.5%BSA，0.05%Tween20，PBS Solution. AREX Biosciences, Catalog # DSAB01
Substrate Solution: Tetramethylbenzidine. AREX Biosciences, Catalog # DSTS01. - Stop Solution: 0.5mol/ml H2SO4. AREX Biosciences, Catalog # DSSS01.
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