Description
Mouse IL-21 ELISA Kit
The Mouse IL-21 ELISA Kit is a highly sensitive and specific assay designed for the accurate detection of interleukin 21 (IL-21) levels in mouse serum, plasma, and cell culture supernatants. This kit provides reliable and reproducible results, making it ideal for a variety of research applications.IL-21 is a key cytokine involved in regulating immune responses, including the differentiation and function of various immune cells. It plays a crucial role in the development and progression of autoimmune diseases, inflammatory disorders, and cancer.
By measuring IL-21 levels, researchers can gain valuable insights into the immune system and potential therapeutic targets for various diseases.Don't miss out on the opportunity to study the role of IL-21 in immune regulation and disease pathology with our Mouse IL-21 ELISA Kit. Order now and take your research to the next level.
| Assay type: | Sandwich |
| Format: | 96T |
| Assay time: | 4.5h |
| Reactivity: | Mouse |
| Detection Method: | Colormetric |
| Detection Range: | 31.25-2000 pg/mL |
| Sensitivity: | 18.75 pg/mL |
| Sample Volume Required Per Well: | 100µL |
| Sample Type: | Serum, plasma and other biological fluids |
| Specificity: | This kit recognizes Mouse IL21 ELISA Kit in samples. No significant cross-reactivity or interference between Mouse IL21 ELISA Kit and analogues was observed. |
This ELISA kit uses Sandwich-ELISA as the method. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Mouse IL21. Standards or samples are added to the appropriate micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Mouse IL21 and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well successively and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Mouse IL21, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by adding Stop Solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Mouse IL21. The concentration of Mouse IL21 in samples can be calculated by comparing the OD of the samples to the standard curve.
| UniProt Protein Function: | IL21: Cytokine with immunoregulatory activity. May promote the transition between innate and adaptive immunity. Induces the production of IgG(1) and IgG(3) in B-cells. May play a role in proliferation and maturation of natural killer (NK) cells in synergy with IL15. May regulate proliferation of mature B- and T-cells in response to activating stimuli. In synergy with IL15 and IL18 stimulates interferon gamma production in T-cells and NK cells. During T-cell mediated immune response may inhibit dendritic cells (DC) activation and maturation. Belongs to the IL-15/IL-21 family. 2 isoforms of the human protein are produced by alternative splicing. |
| UniProt Protein Details: | Protein type:Secreted; Apoptosis; Cytokine; Cell development/differentiation; Secreted, signal peptide Cellular Component: extracellular space; extracellular region Molecular Function:hematopoietin/interferon-class (D200-domain) cytokine receptor binding; interleukin-2 receptor binding; cytokine activity Biological Process: positive regulation of interleukin-17 production; positive regulation of natural killer cell cytokine production; cell maturation; B cell apoptosis; positive regulation of natural killer cell mediated cytotoxicity; positive regulation of interleukin-10 production; positive regulation of tyrosine phosphorylation of Stat3 protein; positive regulation of natural killer cell differentiation; positive regulation of tyrosine phosphorylation of Stat1 protein; positive regulation of cell proliferation; positive regulation of B cell proliferation; positive regulation of B cell differentiation; immune response; positive regulation of T cell proliferation; positive regulation of interferon-gamma biosynthetic process |
| UniProt Code: | Q9ES17 |
| NCBI GenInfo Identifier: | 55976590 |
| NCBI Gene ID: | 60505 |
| NCBI Accession: | Q9ES17. 1 |
| UniProt Related Accession: | Q9ES17 |
| Molecular Weight: | 16,811 Da |
| NCBI Full Name: | Interleukin-21 |
| NCBI Synonym Full Names: | interleukin 21 |
| NCBI Official Symbol: | Il21 |
| NCBI Official Synonym Symbols: | IL-21 |
| NCBI Protein Information: | interleukin-21 |
| UniProt Protein Name: | Interleukin-21 |
| UniProt Gene Name: | Il21 |
| UniProt Entry Name: | IL21_MOUSE |
As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e. g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.
| Concentration (pg/mL) | O.D | Average | Corrected |
| 2000 | 2.405 2.457 | 2.431 | 2.353 |
| 1000 | 1.676 1.712 | 1.694 | 1.616 |
| 500 | 0.969 0.955 | 0.962 | 0.884 |
| 250 | 0.503 0.521 | 0.512 | 0.434 |
| 125 | 0.271 0.241 | 0.256 | 0.178 |
| 62.5 | 0.183 0.177 | 0.18 | 0.102 |
| 31.25 | 0.12 0.14 | 0.13 | 0.052 |
| 0 | 0.073 0.083 | 0.078 | -- |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Mouse IL21 ELISA Kit were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Mouse IL21 ELISA Kit were tested on 3 different plates, 20 replicates in each plate.
| Intra-assay Precision | Inter-assay Precision | |||||
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 20 | 20 | 20 | 20 | 20 | 20 |
| Mean (pg/mL) | 91.74 | 199.56 | 773.63 | 92.03 | 210.45 | 803.96 |
| Standard deviation | 5.10 | 11.28 | 36.13 | 5.70 | 12.33 | 39.80 |
| C V (%) | 5.56 | 5.65 | 4.67 | 6.19 | 5.86 | 4.95 |
Recovery
The recovery of Mouse IL21 ELISA Kit spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.
| Sample Type | Range (%) | Average Recovery (%) |
| Serum (n=5) | 96-108 | 101 |
| EDTA plasma (n=5) | 88-102 | 94 |
| Cell culture media (n=5) | 96-108 | 101 |
Linearity
Samples were spiked with high concentrations of Mouse IL21 ELISA Kit and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.
| Serum (n=5) | EDTA plasma (n=5) | Cell culture media (n=5) | ||
| 1:2 | Range (%) | 87-100 | 88-103 | 97-111 |
| Average (%) | 94 | 94 | 105 | |
| 1:4 | Range (%) | 92-103 | 87-98 | 87-100 |
| Average (%) | 97 | 93 | 94 | |
| 1:8 | Range (%) | 92-106 | 84-99 | 83-96 |
| Average (%) | 98 | 90 | 90 | |
| 1:16 | Range (%) | 90-100 | 85-99 | 89-102 |
| Average (%) | 95 | 91 | 95 |
An unopened kit can be stored at 4°C for 1 month. If the kit is not used within 1 month, store the items separately according to the following conditions once the kit is received.
| Item | Specifications | Storage |
| Micro ELISA Plate(Dismountable) | 8 wells ×12 strips | -20°C, 6 months |
| Reference Standard | 2 vials | |
| Concentrated Biotinylated Detection Ab (100×) | 1 vial, 120 µL | |
| Concentrated HRP Conjugate (100×) | 1 vial, 120 µL | -20°C(shading light), 6 months |
| Reference Standard & Sample Diluent | 1 vial, 20 mL | 4°C, 6 months |
| Biotinylated Detection Ab Diluent | 1 vial, 14 mL | |
| HRP Conjugate Diluent | 1 vial, 14 mL | |
| Concentrated Wash Buffer (25×) | 1 vial, 30 mL | |
| Substrate Reagent | 1 vial, 10 mL | 4°C(shading light) |
| Stop Solution | 1 vial, 10 mL | 4°C |
| Plate Sealer | 5 pieces | |
| Product Description | 1 copy | |
| Certificate of Analysis | 1 copy |
- Set standard, test sample and control (zero) wells on the pre-coated plate and record theirpositions. It is recommended to measure each standard and sample in duplicate. Note: addall solutions to the bottom of the plate wells while avoiding contact with the well walls. Ensuresolutions do not foam when adding to the wells.
- Aliquot 100µl of standard solutions into the standard wells.
- Add 100µl of Sample / Standard dilution buffer into the control (zero) well.
- Add 100µl of properly diluted sample (serum, plasma, tissue homogenates and otherbiological fluids) into test sample wells.
- Cover the plate with the sealer provided in the kit and incubate for 90 min at 37°C.
- Aspirate the liquid from each well, do not wash. Immediately add 100µL of BiotinylatedDetection Ab working solution to each well. Cover the plate with a plate seal and gently mix. Incubate for 1 hour at 37°C.
- Aspirate or decant the solution from the plate and add 350µL of wash buffer to each welland incubate for 1-2 minutes at room temperature. Aspirate the solution from each well andclap the plate on absorbent filter paper to dry. Repeat this process 3 times. Note: a microplatewasher can be used in this step and other wash steps.
- Add 100µL of HRP Conjugate working solution to each well. Cover with a plate seal andincubate for 30 min at 37°C.
- Aspirate or decant the solution from each well. Repeat the wash process for five times asconducted in step 7.
- Add 90µL of Substrate Reagent to each well. Cover with a new plate seal and incubate forapproximately 15 min at 37°C. Protect the plate from light. Note: the reaction time can beshortened or extended according to the actual color change, but not by more than 30min.
- Add 50 µL of Stop Solution to each well. Note: Adding the stop solution should be done inthe same order as the substrate solution.
- Determine the optical density (OD value) of each well immediately with a microplate readerset at 450 nm.
