Product Description:
Purpose
This kit allows for the determination of IL-21 concentrations in Rat serum, plasma and other biological fluids
Principle of the assay
The kit assay Rat IL-21 level in the sample,use Purified Rat IL-21 antibody to coat microtiter plate wells, make solid-phase antibody, then add IL-21 to wells, Combined IL-21 antibody which With HRP labeled, become antibody - antigen - enzyme-antibody complex, after washing Completely, Add TMB substrate solution,TMB substrate becomes blue color At HRP enzyme-catalyzed, reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm. The concentration of IL-21 in the samples is then determined by comparing the O.D. of the samples to the standard curve.
Technical Parameters:
| Product Name | Rat IL-21 RUO Elisa Kit |
| Manufacturer | Biovantion Inc |
| Method | ELISA |
| Sample Type | Serum |
| Package Size | 96 Tests |
| Sensitivity | 95% |
| Specificity | 98% |
| Shelf Life | 6 Months |
| Storage Temperature | 2-8°C |
Specimen requirements
- extract as soon as possible after Specimen collection,and according to the relevant literature, and should be experiment as soon as possible after the extraction. If it can’t, specimen can be kept in -20 ℃ to preserve, Avoid repeated freeze-thaw cycles.
- Can’t detect the sample which contain NaN3, because NaN3 inhibits HRP active.
Assay procedure
- Dilute and add sample:Dilute Original density Standard as follow table:
| 800pg/ml | 5 Standard | 150μl Original density Standard+150μl Standard diluent |
| 400pg/ml | 4 Standard | 150μl 5 Standard+150μl Standard diluent |
| 200pg/ml | 3 Standard | 150μl 4 Standard+150μl Standard diluent |
| 100pg/ml | 2 Standard | 150μl 3 Standard +150μl Standard diluent |
| 50pg/ml | 1 Standard | 150μl 2 Standard +150μl Standard diluent |
2.add sample:Set blank wells separately (blank comparison wells don’t add sample and HRP-Conjugate reagent, other each step operation is same). testing sample well. Add 50μl of standard to Microelisa stripplate,add Sample dilution 40μl to testing sample well, then add testing sample 10μl (sample final dilution is 5-fold), add sample to wells , don’t touch the well wall as far as possible, and Gently mix.
3.Incubate: After closing plate with Closure plate membrane ,incubate for 30 min at 37℃.
4.Configurate liquid: 30-fold(or 20-fold) wash solution diluted 30-fold (or 20-fold) with distilled water and reserve.
5.washing:Uncover Closure plate membrane, discard Liquid, dry by swing, add washing buffer to every well, still for 30s then drain, repeat 5 times, dry by pat.
6.add enzyme:Add HRP-Conjugate reagent 50μl to each well, except blank well.
7.incubate:Operation with 3.
8.washing:Operation with 5.
9.color:Add Chromogen Solution A 50ul and Chromogen Solution B 50ul to each well, evade the light preservation for 10 min at 37℃
10.Stop the reaction:Add Stop Solution50μl to each well, Stop the reaction(the blue color change to yellow color).
11.assay:take blank well as zero , Read absorbance at 450nm after Adding Stop Solution and within 15min.
Support and Services:
The RUO Test Kit product technical support and services include:
- Assistance with test kit set up and installation
- Guidance on running and interpreting test results
- Troubleshooting technical issues and providing solutions
- Providing documentation and resources for product use and maintenance
- Offering training and education on best practices for using the test kit
- Continuous product updates and improvements
