重组人白介素2|Human IL-2|Interleukin-2 Human RecombinantProSpec（蛋白质专家）是以色列一家具有超过16年历史的，专业从事细菌来源重组蛋白生产的先进生物技术公司。ProSpec生产多种细胞因子、生长因子、趋化因子、激素、酶、病毒抗原和许多其他重组蛋白。在研究团队和科学家们的努力下，ProSpec已经拥有超过1700种可用于癌症、细胞凋亡、发育、内分泌学、免疫学、神经科学、蛋白酶及干细胞研究用重组蛋白、多肽和抗体。10多年蛋白纯化方面的经验使ProSpec公司生产成本低、产量高、效率高，其蛋白产品不仅纯度高、生物活性高，价格也非常具有优势。同时ProSpec针对客户的需要提供自定义重组蛋白生产服务。 ProSpec向客户提供蛋白质产品、服务和技术授权。因为创新的产品、卓越的客户服务和对细节的注重，ProSpec在科学界建立了良好的信誉，具有广泛的客户群，包括世界各地的学术、政府研究机构，生物技术和制药企业以及医院和基准实验室。
产品详情：
CATALOGUE NUMBER
CYT-209
SYNONYMS
T-cell growth factor (TCGF), Aldesleukin, Lymphokine, IL-2.
INTRODUCTION
IL2 is a secreted cytokine that is important for the proliferation of T and B lymphocytes. The receptor of this cytokine is a heterotrimeric protein complex whose gamma chain is also shared by interleukin 4 (IL4) and interleukin 7 (IL7). The expression of this gene in mature thymocytes is monoallelic, which represents an unusual regulatory mode for controlling the precise expression of a single gene. The targeted disruption of a similar gene in mice leads to ulcerative colitis-like disease, which suggests an essential role of this gene in the immune response to antigenic stimuli.
DESCRIPTION
Interleukin-2 Human Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 134 amino acids and having a molecular mass of 15kDa.
The IL-2 is purified by proprietary chromatographic techniques.
SOURCE
Escherichia Coli.
PHYSICAL APPEARANCE
Sterile Filtered White lyophilized (freeze-dried) powder.
FORMULATION
The protein (1mg/ml) was lyophilized after extensive dialysis against 20mM PBS pH=7.4.
SOLUBILITY
It is recommended to reconstitute the lyophilized Interleukin 2 in 20mM AcOH not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
STABILITY
Lyophilized Interleukin-2 although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution IL2 should be stored at 4°C between 2-7 days and for future use below -18°C.
For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Please prevent freeze-thaw cycles.
PURITY
Greater than 97.0% as determined by:
(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.
AMINO ACID SEQUENCE
MAPTSSSTKK TQLQLEHLLL DLQMILNGIN NYKNPKLTRM LTFKFYMPKK ATELKHLQCL EEELKPLEEV LNLAQSKNFH LRPRDLISNI NVIVLELKGS ETTFMCEYAD ETATIVEFLN RWITFCQSII STLT.
BIOLOGICAL ACTIVITY
The ED50 as determined by the dose-dependant stimulation of murine CTLL-2 cells is < 0.1 ng/ml, corresponding to a Specific Activity of 10,000,000 IU/mg.
REFERENCES
1.Title:CD8 Kinetically Promotes Ligand Binding to the T-Cell Antigen Receptor.
Publication:Biophysical Journal Volume 89 September 2005 2121–2133.
Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1366714/pdf/2121.pdf3. Title: Conservation of cytokine-mediated responses in innate immunity: a flow cytometric study investigating the effects of human proinflammatory cytokines on phagocytosis in the earthworm Eisenia hortensis
Publication: Invertebrate Survival Journal 5 (2008): 124-134.
USAGE
ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
