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产品信息
优势特色（Features）
- Designed under ISO 9001:2015 and ISO 13485:2016
- Manufactured and QC tested under a GMP compliance factory
- Animal-Free materials
- Beta-lactam materials free
- Batch-to-batch consistency
- Stringent quality control tests
表达区间及表达系统（Source）
GMP Human IL-2 Protein (Liquid) (GMP-L02H14F002) is expressed from E. coli cells. It contains AA Ala 21 - Thr 153 (Accession # P60568-1).
Predicted N-terminus: Met
蛋白结构（Molecular Characterization）
This protein carries no "tag".
The protein has a calculated MW of 15.4 kDa. The protein migrates as 16 kDa±2 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE).
内毒素（Endotoxin）
Less than 25 EU/ Vial by the LAL method.
宿主蛋白残留（Host Cell Protein）
<0.5 ng/µg of protein tested by ELISA.
宿主核酸残留（Host Cell DNA）
<0.1 ng/μg of protein tested by qPCR.
无菌（Sterility）
The sterility testing was performed by membrane filtration method described in CP<1101>, USP<71> and Eur. Ph. 2.6.1.
支原体（Mycoplasma）
Negative.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Supplied as 0.2 μm filtered solution in phosphate with protectants.
Contact us for customized product form or formulation.
运输（Shipping）
This product is supplied and shipped with dry ice, please inquire the shipping cost.
存储（Storage）
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- The product MUST be stored at -70°C or lower upon receipt;
- -70°C for 24 months under sterile conditions.
产品数据图
电泳（SDS-PAGE）
GMP Human IL-2 Protein (Liquid) on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95% (With Star Ribbon Pre-stained Protein Marker).
活性（Bioactivity）-Bioactivity CELL BASE
GMP Human IL-2 Protein (Liquid) (Cat. No. GMP-L02H14F002) stimulates proliferation of CTLL-2 cells. The specific activity of GMP Human IL-2 Protein (Liquid) is ≥ 1.20 × 10^7 IU/mg, which is calibrated against human Interleukin-2 China National Standard (NIFDC code: 270008) (QC tested). China National Institutes for Food and Drug Control (NIFDC) Standard was prepared and calibrated against human IL-2 WHO International Standard (NIBSC code: 86/500) by NIFDC.
Protocol
稳定性（Stability）
The Cell based assay shows that GMP Human IL-2 Protein (Liquid) (Cat. No. GMP-L02H14F002) is stable at 25°C for 65 hours.
The Cell based assay shows that GMP Human IL-2 Protein (Liquid) (Cat. No. GMP-L02H14F002) is stable after freezing and thawing 3 times.
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背景
Interleukin-2 (IL-2) is an interleukin, a type of cytokine immune system signaling molecule, which is a leukocytotrophic hormone that is instrumental in the body's natural response to microbial infection and in discriminating between foreign (non-self) and self. IL-2 mediates its effects by binding to IL-2 receptors, which are expressed by lymphocytes, the cells that are responsible for immunity. Mature human IL-2 shares 56% and 66% aa sequence identity with mouse and rat IL-2, respectively. Human and mouse IL-2 exhibit crossspecies activity. The receptor for IL-2 consists of three subunits that are present on the cell surface in varying preformed complexes. IL-2 is also necessary during T cell development in the thymus for the maturation of a unique subset of T cells that are termed regulatory T cells (T-regs). After exiting from the thymus, T-Regs function to prevent other T cells from recognizing and reacting against "self antigens", which could result in "autoimmunity". T-Regs do so by preventing the responding cells from producing IL-2. Thus, IL-2 is required to discriminate between self and non-self, another one of the unique characteristics of the immune system.
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