Recombinant Equine IL-2 (Cys141Ser) Protein
R&D Systems, part of Bio-Techne | Catalog # 1613-IL
Key Product Details
Product Specifications
Source
E. coli-derived equine IL-2 protein
Ala21-Thr149 (Cys141Ser), with and without an N-terminal Met
Ala21-Thr149 (Cys141Ser), with and without an N-terminal Met
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.
N-terminal Sequence Analysis
Met & Ala21
Predicted Molecular Mass
15 kDa
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 0.3-1.5 µg/mL.
The ED50 for this effect is 0.3-1.5 µg/mL.
Formulation, Preparation and Storage
Carrier Free
What does CF mean?CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
What formulation is right for me?In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
Carrier: 1613-IL
| Formulation | Lyophilized from a 0.2 μm filtered solution in Sodium Acetate with BSA as a carrier protein. |
| Reconstitution | Reconstitute at 200 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin. |
| 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.
|
Carrier Free: 1613-IL/CF
| Formulation | Lyophilized from a 0.2 μm filtered solution in Sodium Acetate. |
| Reconstitution | Reconstitute at 200 μg/mL in sterile PBS. |
| 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.
|
Background: IL-2
Interleukin 2 was initially identified as a T cell growth factor that is produced by T cells following activation by mitogens or antigens (1). IL-2 has since been found to also stimulate the growth and differentiation of B cells, natural killer (NK) cells, lymphocyte activated killer (LAK) cells, monocytes/macrophages and oligodendrocytes (2).
The biological activity of IL-2 is mediated by the binding of IL-2 to cell surface receptor complexes. The functional high-affinity receptor that mediate IL‑2 signals is composed of three polypeptide chains, the IL-2 receptor alpha, beta and gamma subunits (3). IL-2 also signals via the intermediate affinity receptor complex of the beta and gamma subunits (4). In T cells, the beta and gamma subunits are shared with the IL-15 receptor complex (5). The gamma subunit of the IL-2 receptor complex has also been shown to be a subunit of the receptor complexes of IL-4, IL-7, IL-9 and IL-21 (6).
At the amino acid sequence level, equine IL-2 shares 72%, 70%, 56% and 54% sequence similarities with human, porcine, rat and mouse IL-2, respectively. It has been reported that equine IL-2 augmented proliferation in equine peripheral blood mononuclear cells, but has no effect on mouse CTLL-2 cells (7).
References
- Morgan, D.A. et al. (1976) Science 193:1007.
- Smith, K.A. et al. (1988) Science 240:1169.
- Taniguchi, T. and Y. Minami (1993) Cell 73:5.
- Giri, J. et al. (1994) EMBO J. 13:2822.
- Waldmann, T. et al. (1998) Int. Rev. Immunol. 16:205.
- Nelson, B.H. and D.M. Willeford (1998) Adv. Immunol. 70:1.
- E.V. Vandergrift and D.W. Horohov (1993) Vet. Immunol. Immunopathol. 39:395.
Long Name
Interleukin 2
Alternate Names
Aldesleukin, IL2, Proleukin, TCGF
Entrez Gene IDs
Gene Symbol
IL2
UniProt
Additional IL-2 Products
Product Documents for Recombinant Equine IL-2 (Cys141Ser) Protein
Product Specific Notices for Recombinant Equine IL-2 (Cys141Ser) Protein
For research use only
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