Recombinant Human IL-2, Animal-Free Protein

(1 citations)   

Animal Free Proteins
Animal-free proteins are particularly important for researchers concerned with experimental variables caused by trace animal components or mammalian pathogens. Our products generated under animal-free conditions share the same biological activities as those produced using our standard laboratory techniques.

  • Purity
    >97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
  • Endotoxin Level
    <0.01 EU per 1 μg of the protein by the LAL method.
  • Activity
    Measured in a cell proliferation assay using CTLL‑2 mouse cytotoxic T cells. Gearing, A.J.H. and C.B. Bird (1987) in Lymphokines and Interferons, A Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 295. The ED50 for this effect is 0.05-0.25 ng/mL.
    The specific activity of Recombinant Human IL-2 is approximately 2.1 x 104 IU/μg, which is calibrated against recombinant human IL-2 WHO International Standard (NIBSC code: 86/500).
  • Source
    E. coli-derived Ala21-Thr153, with an N-terminal Met Produced using non-animal reagents in an animal-free laboratory.
  • Accession #
  • N-terminal Sequence
    Analysis
    Met
  • Predicted Molecular Mass
    15 kDa
AFL202
 
Formulation Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA with Trehalose.
Reconstitution Reconstitute at 0.2 mg/mL in sterile 100 mM Acetic Acid.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 3 months, 2 to 8 °C under sterile conditions after reconstitution.

Animal Free Proteins
Animal-free proteins are particularly important for researchers concerned with experimental variables caused by trace animal components or mammalian pathogens. Our products generated under animal-free conditions share the same biological activities as those produced using our standard laboratory techniques.

Background: IL-2

Interleukin-2 (IL-2) is a O-glycosylated, four alpha -helix bundle cytokine that has potent stimulatory activity for antigen-activated T cells. It is expressed by CD4+ and CD8+ T cells, gamma δ T cells, B cells, dendritic cells, and eosinophils (1 - 3). Mature human IL-2 shares 56% and 66% amino acid sequence identity with mouse and rat IL-2, respectively. Human and mouse IL-2 exhibit cross-species activity (4). The receptor for IL-2 consists of three subunits that are present on the cell surface in varying preformed complexes (5 - 7). The 55 kDa IL-2 R alpha is specific for IL-2 and binds with low affinity. The 75 kDa IL-2 R beta, which is also a component of the IL-15 receptor, binds IL-2 with intermediate affinity. The 64 kDa common gamma chain gamma c/IL-2 R gamma, which is shared with the receptors for IL-4, -7, -9, -15, and -21, does not independently interact with IL-2. Upon ligand binding, signal transduction is performed by both IL-2 R beta and gamma c. IL-2 is best known for its autocrine and paracrine activity on T cells. It drives resting T cells to proliferate and induces IL-2 and IL-2 R alpha synthesis (1, 2). It contributes to T cell homeostasis by promoting the Fas-induced death of naïve CD4+ T cells but not activated CD4+ memory lymphocytes (8). IL-2 plays a central role in the expansion and maintenance of regulatory T cells, although it inhibits the development of Th17 polarized cells (9-11). Thus, IL-2 may be a key cytokine in the natural suppression of autoimmunity (12, 13).

  • References:
    1. Ma, A. et al. (2006) Annu. Rev. Immunol. 24:657.
    2. Gaffen, S.L. and K.D. Liu (2004) Cytokine 28:109.
    3. Taniguchi, T. et al. (1983) Nature 302:305.
    4. Mosmann, T.R. et al. (1987) J. Immunol. 138:1813.
    5. Liparoto, S.F. et al. (2002) Biochemistry 41:2543.
    6. Wang, X. et al. (2005) Science 310:1159.
    7. Bodnar, A. et al. (2008) Immunol. Lett. 116:117.
    8. Jaleco, S. et al. (2003) J. Immunol. 171:61.
    9. Malek, T.R. (2003) J. Leukoc. Biol. 74:961.
    10. Laurence, A. et al. (2007) Immunity 26:371.
    11. Kryczek, I. et al. (2007) J. Immunol. 178:6730.
    12. Afzali, B. et al. (2007) Clin. Exp. Immunol. 148:32.
    13. Fehervari, Z. et al. (2006) Trends Immunol. 27:109.
  • Long Name:
    Interleukin 2
  • Entrez Gene IDs:
    3558 (Human); 16183 (Mouse); 116562 (Rat); 396868 (Porcine); 280822 (Bovine); 403989 (Canine); 100034204 (Equine); 751114 (Feline); 100302458 (Rabbit)
  • Alternate Names:
    aldesleukin; IL2; IL-2; IL-2lymphokine; interleukin 2; interleukin-2; involved in regulation of T-cell clonal expansion; T cell growth factor; T-cell growth factor; TCGF

Animal-Free Manufacturing Conditions
Our dedicated controlled-access animal-free laboratories ensure that at no point in production are the products exposed to potential contamination by animal components or byproducts. Every stage of manufacturing is conducted in compliance with R&D Systems' stringent Standard Operating Procedures (SOPs). Production and purification procedures use equipment and media that are confirmed animal-free.

Production
  • All molecular biology procedures use animal-free media and dedicated labware.
  • Dedicated fermentors are utilized in committed animal-free areas.
Purification
  • Protein purification columns are animal-free.
  • Bulk proteins are filtered using animal-free filters.
  • Purified proteins are stored in animal-free containers in a dedicated cold storage room.
Quality Assurance
  • Low Endotoxin Level.
  • No impairment of biological activity.
  • High quality product obtained under stringent conditions.
  • For ex vivo research or bioproduction, additional documentation can be provided.

Please read our complete Animal-Free Statement



Related Research Areas
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citations: Showing 1 - 1

  1. IL-15 promotes activation and expansion of CD8+ T cells in HIV-1 infection
    Authors: Souheil-Antoine Younes
    J Clin Invest, 2016;126(7):2745-2756.
    Species: Human
    Sample Type: Whole Cells
    Application: Bioassay

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