Recombinant Guinea Pig IL-1 beta/IL-1F2 Protein, CF

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Product Details

Summary
Reactivity GPSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

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Recombinant Guinea Pig IL-1 beta/IL-1F2 Protein, CF Summary

Details of Functionality
Measured in a cell proliferation assay using D10.G4.1 mouse helper T cells. Symons, J.A. et al. (1987) in Lymphokines and Interferons, a Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 272.

The ED50 for this effect is 7‑35 pg/mL.

Source
E. coli-derived guinea pig IL-1 beta/IL-1F2 protein
Thr115-Ser266, with an N-terminal Met
Accession #
N-terminal Sequence
Met
Structure / Form
Monomer
Protein/Peptide Type
Recombinant Proteins
Gene
Il1b
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.01 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Theoretical MW
17.4 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
18 kDa, reducing conditons

Packaging, Storage & Formulations

Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in MES, NaCl, DTT, and EDTA.
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 100 μg/mL in PBS.

Notes

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

Alternate Names for Recombinant Guinea Pig IL-1 beta/IL-1F2 Protein, CF

  • catabolin
  • IL1 beta
  • IL-1 beta
  • IL-1
  • IL1B
  • IL-1b
  • IL1-BETA
  • IL-1F2
  • IL1F2IL-1 beta
  • interleukin 1, beta
  • interleukin-1 beta
  • preinterleukin 1 beta
  • pro-interleukin-1-beta

Background

IL-1 is a name that designates two pleiotropic cytokines, IL-1 alpha (IL-1F1) and IL-1 beta (IL-1F2), which are the products of distinct genes. IL-1 alpha and IL-1 beta are structurally related polypeptides that share approximately 18% amino acid (aa) identity in guinea pig. Both proteins are produced by a wide variety of cells in response to inflammatory agents, infections, or microbial endotoxins. While IL-1 alpha and IL-1 beta are regulated independently, they bind to the same receptor and exert identical biological effects. IL‑1 R1 binds directly to IL-1 alpha or IL-1 beta and then associates with IL-1 R accessory protein (IL‑1 R3/IL‑1 R AcP) to form a high-affinity receptor complex that is competent for signal transduction. IL-1 R2 has high affinity for IL-1 beta but functions as a decoy receptor and negative regulator of IL-1 beta activity. IL‑1ra functions as a competitive antagonist by preventing IL-1 alpha and IL-1 beta from interacting with IL‑1 R1 (1 ‑ 4). The guinea pig IL-1 beta cDNA encodes a 266 aa precursor. A 114 aa propeptide is cleaved intracellularly by the cysteine protease IL-1 beta -converting enzyme (Caspase-1/ICE) to generate the active cytokine (5, 6). The 17 kDa mature guinea pig IL-1 beta shares 64% ‑ 80% aa sequence identity with canine, cotton rat, equine, feline, human, mouse, porcine, rat, and rhesus IL‑1 beta.
  1. Allan, S.M. et al. (2005) Nat. Rev. Immunol. 5:629.
  2. Boraschi, D. and A. Tagliabue (2006) Vitam. Horm. 74:229.
  3. Kornman, K.S. (2006) Am. J. Clin. Nutr. 83:475S.
  4. Isoda, K. and F. Ohsuzu (2006) J. Atheroscler. Thromb. 13:21.
  5. Accession # Q9WVG1.
  6. Martinon, F. and J. Tschopp (2007) Cell Death Differ. 14:10.

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IL-1 beta (interleukin 1 beta, lymphocyte activating factor (LAF))
IL-1 was originally identified and cloned as a lymphocyte mitogen and much later, was found to be comprised of two closely related but distinct proteins, interleukin 1 alpha (IL-1 alpha) and interleukin 1 beta (IL-1 beta). Both these proteins bind...  Read full blog post.

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Bioinformatics

Gene Symbol Il1b
Entrez
Uniprot