Human IL-21 ELISA Kit
Validation Data Gallery
Product Information
KE00022 is a solid phase sandwich Enzyme Linked-Immuno-Sorbent Assay (Sandwich ELISA). The IL-21 ELISA kit is to be used to detect and quantify protein levels of endogenous IL-21. The assay recognizes human IL-21. An antibody specific for IL-21 has been pre-coated onto the microwells. The IL-21 protein in samples is captured by the coated antibody after incubation. Following extensive washing, another antibody of biotinylated specific for IL-21 is added to detect the captured IL-21 protein. For signal development, Sterptravidin-HRP is added, followed by Tetramethyl-benzidine (TMB) reagent. Solution containing sulfuric acid is used to stop color development and the color intensity which is proportional to the quantity of bound protein is measurable at 450 nm with the correction wavelength set at 630 nm.
| Product name | Human IL-21 ELISA Kit |
| Tests | 1 X 96 well plate |
| Sample type | Serum, Plasma, Cell culture supernatants 备注：对未验证样本，我们提供技术支持和售后保障。 |
| Assay type | Sandwich |
| Sensitivity | 2.0 pg/mL |
| Range | 15.6-1000 pg/mL |
| Reactivity | Human |
| Tested applications | Sandwich ELISA |
| Gene ID (NCBI) | 59067 |
Recovery
| Sample Type | Average | Range |
|---|---|---|
| Human plasma | 97% | 88%-120% |
| Cell culture supernatants | 109% | 96%-117% |
IntraAssay
| Sample | n | mean ( pg/mL) | SD | CV% |
|---|---|---|---|---|
| 1 | 20 | 949.9 | 48.4 | 5.1 |
| 2 | 20 | 226.4 | 8.7 | 3.9 |
| 3 | 20 | 22.4 | 1.1 | 4.8 |
InterAssay
| Sample | n | mean ( pg/mL) | SD | CV% |
|---|---|---|---|---|
| 1 | 24 | 939.8 | 32.9 | 3.5 |
| 2 | 24 | 217.2 | 10.3 | 4.7 |
| 3 | 24 | 22.0 | 1.4 | 6.6 |
Background Information
Interleukin 21 (IL-21) is a cytokine produced predominantly by cluster of differentiation 4 (CD4+) T-cells and natural killer T-cells. IL-21 is preliminarily expressed in activated cluster of differentiation 4 (CD4+) T-cells and natural killer (NK) T-cells. IL-21 receptor (IL-21R) is a class I cytokine receptor, which requires dimerization with the indispensable common gamma chain (γc) subunit to bind IL-21. IL-21 plays a role in both the innate and adaptive immune responses by inducing the differentiation, proliferation and activity of multiple target cells including macrophages, natural killer cells, B cells and cytotoxic T cells. IL-21 mediates apoptosis in B-CLL cells through up-regulation of the BIM (BH3 family member) and enhances both direct and antibody-dependent cellular cytotoxicity in these cells.
Properties
| Storage Instructions | All the reagents are stored at 2-8℃ for 6 months or -20℃ for 12 months. Refer to the protocol for further storage instructions. |
| Synonyms | IL 21, IL21, IL-21, interleukin 21, Za11 |
FAQ
1、我的样本稀释液有限，如何处理稀释倍数较大的样本？
我们建议您对样本进行梯度稀释。例如，人血清样本需要1000000倍稀释时，您可以分3个梯度，每个梯度100倍，进行稀释：
第一步：取2 uL人血清样本，加入198 uL样本稀释液，混匀得到100倍稀释的人血清样本
第二步：取2uL 100倍稀释的人血清样本+ 198 uL样本稀释液进行稀释，混匀得到10000倍稀释的人血清样本
第三步：取2uL 10000倍稀释的人血清样本+ 198 uL样本稀释液进行稀释，混匀得到1000000倍稀释的人血清样本。
如果样本需要进一步稀释，您可以使用更多梯度。除了我们推荐的样本稀释液，不建议您使用其他溶液或者水稀释。如果您的样本稀释液仍然不足，请联系我们的客服为您提供更多样本稀释液。
Publications
| Species | Sample Type | Title |
|---|---|---|
J Immunol Mouse Liver B Cells Phagocytose Streptococcus pneumoniae and Initiate Immune Responses against Their Antigens. | ||
Heliyon Conditional reprogrammed human limbal epithelial cell model for anti-SARS-CoV-2 drug screening | ||
Platelets Abnormal expansion of peripheral helper T cells in primary immune thrombocytopenia. |
