Bovine IL-2 Antibody

Catalog #: AF2465 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
AF2465
AF2465-SP

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Bovine IL-2 Antibody Summary

Species Reactivity

Bovine

Specificity

Detects bovine IL-2 in ELISAs and Western blots. In sandwich immunoassays, less than 0.2% cross-reactivity with recombinant human IL-2, recombinant mouse IL-2, recombinant rat IL-2, recombinant feline IL-2, recombinant canine IL-2, recombinant equine IL-2, recombinant cotton rat IL-2, and recombinant porcine IL-2 is observed.

Source

Polyclonal Goat IgG

Purification

Antigen Affinity-purified

Immunogen

E. coli-derived recombinant bovine IL‑2
Ala21-Thr155
Accession # P05016

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Label

Unconjugated

Applications

Recommended Concentration

Sample

Western Blot

0.1 µg/mL

Recombinant Bovine IL‑2 (Catalog # 2465-BL)

Immunocytochemistry

5-15 µg/mL

See below

Bovine IL-2 Sandwich Immunoassay

Recommended Concentration

Reagent

ELISA Capture (Matched Antibody Pair)

0.2-0.8 µg/mL

Use in combination with:

Detection Reagent: Bovine IL‑2 Biotinylated Antibody (Catalog # BAF2465)

Standard: Recombinant Bovine IL-2 Protein (Catalog # 2465-BL)

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Immunocytochemistry

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IL‑2 in Bovine PBMCs. IL-2 was detected in immersion fixed bovine peripheral blood mononuclear cells (PBMCs) using Goat Anti-Bovine IL-2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2465) at 15 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store 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.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: IL-2

Bovine Interleukin-2 (IL-2) is a 15 kDa, alpha -helical, single chain, potentially glycosylated polypeptide that has potent stimulatory activity for antigen-activated T cells (1‑5). The molecule is synthesized as a 155 amino acid (aa) precursor that contains a 20 aa signal peptide plus a 135 aa mature segment that is possibly O‑glycosylated (4, 5). The mature region has multiple alpha -helices and one intrachain disulfide bond. Mature bovine IL-2 is 64%, 60%, 49%, 50%, 72%, 63% and 67% to mature human, canine, mouse, rat, porcine, equine, and feline IL-2, respectively. Mammalian cells known to express IL-2 include CD4⁺ and CD8⁺ T cells, visceral smooth muscle cells, eosinophils, gamma δ T cells, B cells and dendritic cells. The receptor for IL-2 is complex and consists of three distinct subunits in varying combinations (6, 7). Two of these are ligand-binding and are termed IL-2 R alpha and IL-2 R beta. IL-2 R alpha is 55 kDa and binds IL-2 with low affinity. IL-2 R beta is 75 kDa and binds IL-2 with intermediate affinity. Signal transduction is performed by both IL-2 R beta and a 64 kDa common gamma chain ( gamma _c). This signal transducing common gamma chain does not bind IL-2, but does heterodimerize with IL-2 R beta to form a functional IL-2 receptor. The complex heterotrimeric alpha -beta -gamma c receptor may arise from IL-2 binding to preformed R alpha -R beta complexes (8). Functionally, IL-2 is best known for its autocrine and paracrine activity on T cells. It drives resting T cells into active G1, inducing IL-2 and IL-2 R alpha synthesis and cell proliferation (7). It also promotes Fas-induced death of naïve CD4⁺ T cells, while having minimal effect on activated CD4⁺ memory lymphocytes. Finally, IL-2 seems to play a central role in the expansion and maintenance of CD4⁺ CD25⁺ regulatory T cells. Thus, IL-2 may be a key cytokine in the natural suppression of autoimmunity (9, 10).

References

Smith, K.A. (1992) Curr. Opin. Immunol. 4:271.
Smith, K.A. (1988) Science 240:1169.
Waldmann, T.A. et al. (2001) Immunity 14:105.
Cerretti, D.P. et al. (1986) Proc. Natl. Acad. Sci. USA 83:3223.
Reeves, R. et al. (1986) Proc. Natl. Acad. Sci. USA 83:3228.
Ellery, J.M. and P.J. Nicholls (2002) Cytokine Growth Factor Rev. 13:27.
Nelson, B.H. and D.M. Willerford (1998) Adv. Immunol. 70:1.
Liparoto, S.F. et al. (2002) Biochemistry 41:2543.
Jaleco, S. et al. (2003) J. Immunol. 171:61.
Malek, T.R. (2003) J. Leukoc. Biol. 74:961.

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; Proleukin; T cell growth factor; T-cell growth factor; TCGF