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产品参数（Product Specifications）
Assay TypeSandwich-ELISAAnalyteIL-2Format96T(8×12 strips)ReactivityHumanRegulatory StatusRUOSensitivity< 39.06 pg/mLStandard Curve Range39.06 pg/mL-2500 pg/mLAssay Time2 hr 50 minSuitable Sample TypeFor the quantitative determination of human IL-2 in Cell Culture Supernatants, Plasma, Serum.Sample volume100 uL产品概述（Product Overview）
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.
应用说明（Application）
Human Interleukin-2 (IL-2) ELISA Kit (Residue Testing) was developed for the detection and quantitative determination of GMP human IL-2 in samples from CAR-T product preparation processing where IL-2 is used as an immunotherapy agent.
It is for research use only.
重构方法（Reconstitution）
Please see Certificate of Analysis for details of reconstitution instruction and specific concentration.
存储（Storage）
-20℃
组分（Materials Provided）
IDComponentsSizeCRS003-C01Pre-coated Anti-IL-2 Antibody Microplate1 plate(8×12 strips)CRS003-C02Human IL-2 Standard20 μgCRS003-C03Biotin-Anti-IL-2 Antibody50 μLCRS003-C04Streptavidin-HRP50 μLCRS003-C0510xWashing Buffer50 mLCRS003-C062xDilution Buffer50 mLCRS003-C07Substrate Solution12 mLCRS003-C08Stop Solution7 mL原理（Assay Principles）
This assay kit employs a standard sandwich-ELISA format, providing a rapid detection of IL-2. The kit consists of Pre-coated Anti-IL-2 Antibody Microplate and Human IL-2 Standard and Biotin-Anti-IL-2 Antibody and Streptavidin-HRP and buffers.
Your experiment will include 6 simple steps:
a) Bring all reagents to room temperature(20℃-25℃) before use.
b) Add your sample to the plate and take the Human IL-2 as standard. The samples and standard are diluted by Dilution Buffer.
c) Wash the plate and add the Biotin-Anti-IL-2 Antibody diluted by Dilution Buffer to the plate.
d) Wash the plate and add the Streptavidin-HRP diluted by Dilution Buffer to the plate.
e) Wash the plate and add TMB.
f) Stop the substrate reaction by adding diluted acid. Absorbance (OD) is calculated by the absorbance at 450 nm minus the absorbance at 630 nm to remove background disturbance before statistical analysis. The OD Value reflects the amount of bound protein.
质量管理控制体系（QMS）
产品展示
典型数据-Typical Data
Please refer to DS document for the assay protocol.
For each experiment, a standard curve needs to be set for each micro-plate, and the specific OD value may vary depending on different laboratories, testers, or equipments. The following example data is for reference only.
稀释线性（Dilution Linearity）
To assess the linearity of the assay, samples spiked with high concentrations of human IL-2 were serially diluted with calibrator diluent to produce samples with values within the dynamic range of the assay.
批内差异（Intra-Assay Statistics）
Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision, Intra-Assay Precision CV＜10%.
批间差异（Inter-Assay Statistics）
Three samples of known concentration were tested in three separate assays to assess inter-assay precision, Inter-Assay Precision CV<10%.
回收率（Recovery）
Three parts of blank serum were added with different concentrations of human IL-2, and the serum without human IL-2 was used as background to calculate the recovery rate. The range of the recovery rate is 83.9-98.2%, and the average recovery is 90.2%.
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背景介绍
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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