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产品参数（Product Specifications）
Assay TypeSandwich-ELISAAnalyteIL-4Format96T(8×12 strips)ReactivityHumanRegulatory StatusRUOSensitivity<0.391pg/mLStandard Curve Range0.391 pg/mL-25 pg/mLAssay Time2 hr 50 minSuitable Sample TypeFor the quantitative determination of human IL-4 in Cell Culture Supernatants, Plasma, Serum.Sample volume100 uL产品概述（Product Overview）
resDetect™ Human Interleukin-4 (IL-4) ELISA Kit (Residue Testing) is based on the ELISA sandwich method and is used to detect and quantitatively determine GMP human IL-4 in cell culture supernatants, serum, and plasma. The kit contains GMP human IL-4 (ACROBiosystems, cat#GMP-L04H26) to ensure accurate assay results and is designed to provide a reliable solution for CAR-T product quality assessment during drug development and CMC quality control stages. It can also be used as a universal detection tool for the quantitative determination of human IL-4.
应用说明（Application）
Human Interleukin-4 (IL-4) ELISA Kit (Residue Testing) was developed for the detection and quantitative determination of GMP human IL-4 in samples from CAR-T product preparation processing.
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）
2-8℃
组分（Materials Provided）
IDComponentsSizeCRS004-C01Pre-coated Anti-IL-4 Antibody Microplate1 plate(8×12 strips)CRS004-C02Human IL-4 Standard20 μgCRS004-C03Biotin-Anti-IL-4 Antibody50 μLCRS004-C04Streptavidin-HRP50 μLCRS004-C0510xWashing Buffer50 mLCRS004-C062xDilution Buffer50 mLCRS004-C07Substrate Solution12 mLCRS004-C08Stop Solution7 mL原理（Assay Principles）
This assay kit employs a standard sandwich-ELISA format, providing a rapid detection of IL-4. The kit consists of Pre-coated Anti-IL-4 Antibody Microplate and Human IL-4 Standard and Biotin-Anti-IL-4 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-4 as standard. The samples and standard are diluted by Dilution Buffer.
c) Wash the plate and add the Biotin-Anti-IL-4 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-4 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-4, and the serum without human IL-4 was used as background to calculate the recovery rate. The range of the recovery rate is 80.9-97.7%, and the average recovery is 86.3%.
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