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Mouse IL-2, amino acids Ala21-Gln169 (Accession # NM_008366) was expressed in E. coli.
The 150 amino acid N-terminal methionylated recombinant protein has a predicted molecular mass of 17,231 Da. The DTT-reduced protein and non-reduced protein migrates at approximately 18kDa by SDS-PAGE.
Purity is >98%, as determined by Coomassie stained SDS-PAGE.
0.22 µm filtered protein solution is in 5mM NaH2PO4, 5mM citric acid, 350mM NaCl, pH 4.0, 1mM DTT.
Endotoxin level is <0.1 EU/µg (<0.01ng/µg) protein as determined by the LAL method.
10-100µg sizes are bottled at 200µg/ml. 500µg and larger sizes are bottled at the concentration indicated on the vial.
Storage & Handling:
Unopened vial can be stored at -20°C for six months or at -70°C for one year. For maximum results, quick spin vial prior to opening. Stock solutions should be prepared at no less than 10µg/mL in buffer containing carrier protein such as 1% BSA or HSA or 10% FBS. For long term storage, aliquot into polypropylene vials and store in a manual defrost freezer. Avoid repeated freeze/thaw cycles.
The ED50 is 0.10-0.40 ng/ml, corresponding to a specific activity of 2.5 - 10 x 106 units/mg, as determined by a dose dependent stimulation of HT-2 cells.
IL-2 is a potent lymphoid cell growth factor which exerts its biological activity primarily on T cells. Additionally, IL-2 has been found to stimulate growth and differentiation of B cells, NK cells, LAK cells, monocytes, and oligodendocytes.
Interleukin-2, T cell growth factor (TCGF), Eosinophil differentiation factor (EDF), Killer cell helper factor (KHF), Macrophage-activating factor for cytotoxicity I (MAF-C I), Thymocyte differentiation factor (TDF)
Upregulated by NFAT; downregulated by TCF-8, CIF (colostrum inhibitory factor)
T cells, B cells, NK cells, LAK cells, monocytes, macrophages, oligodendrocytes
High affinity heterotrimer of IL-2Rα/β/γ, intermediate affinity homodimer IL-2Rα (CD25; p55; Tac) and heterodimer IL-2Rβ (CD122)/γ; γ-subunit (CD132) in common with IL-4R, IL-7R, IL-13R, IL-15R
Proliferation of T lymphocytes, B cells, anti-inflammatory, hematopoiesis, tumor surveillance
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