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Human IL-2 Quantikine QuicKit ELISA

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IL-2 is spiked at three known concentrations throughout the range of the assay and run to measure response of the spiked sample matrix. Serum recovery is 103% compared to 113% for the top competitor. EDTA Plasma ...read more

Product Details

Summary
Reactivity HuSpecies Glossary
Applications ELISA
Conjugate
HRP

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Human IL-2 Quantikine QuicKit ELISA Summary

Background
The Quantikine® QuicKit™ Human IL-2 Immunoassay is a one step, 80-minute solid phase ELISA designed to measure human IL-2 levels in cell culture supernates, serum, and plasma. It contains E. coli-expressed recombinant human IL-2 and antibodies raised against the recombinant protein. Results obtained for naturally occurring human IL-2 showed linear curves that were paralle...l to the standard curves obtained using the recombinant QuicKit™ standards. These results indicate that this kit can be used to determine relative mass values for natural IL-2.
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Specificity
Natural and recombinant human IL-2.
Source
N/A
Inter-Assay
See PDF Datasheet for details
Intra-Assay
See PDF Datasheet for details
Spike Recovery
See PDF Datasheet for details
Sample Volume
See PDF Datasheet for details

Applications/Dilutions

Dilutions
  • ELISA
Application Notes
No significant interference observed with available related molecules.
Publications
Read Publication using QK202.

Packaging, Storage & Formulations

Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Human IL-2 Quantikine QuicKit ELISA

  • Aldesleukin
  • IL2
  • IL-2
  • IL-2lymphokine
  • interleukin 2
  • interleukin-2
  • involved in regulation of T-cell clonal expansion
  • Proleukin
  • T cell growth factor
  • T-cell growth factor
  • TCGF

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 (1-4). It exists as a monomer and has a notably short half-life (< 30 minutes) (1). 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 (5, 6). 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 (7). 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 (8), activated conventional CD4+ and CD8+ T cells (1, 9), neurons (10, 11), microglia (12), and hematopoietic stem cells (13). 
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 (1, 3). IL-2 first binds to CD25, the binary complex then recruits IL-2 R beta and gamma c to form the quaternary signaling complex (1, 14). 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 (1, 3). 
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. (1).

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Publications for IL-2 (QK202)(1)

We have publications tested in 1 confirmed species: Human.


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