SKU: 51643452373

Human IL-21 High Sensitivity ELISA Kit

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Description

Human IL-21 High Sensitivity ELISA KitProduct Specification Description Detection Principle: This kit uses double antibody sandwich ELISA technology. Specific anti human IL 21 capture antibody was pre coated on a high affinity microplate. Add the standard, the sample to be tested and the biotin labeled detection antibody into the wells of the enzyme plate in turn, shake well and mix well, and then place it at room temperature for 2 hours of incubation process. The IL 21 in the sample is

Product Specification

Description

Detection Principle:

This kit uses double antibody sandwich ELISA technology. Specific anti-human IL-21 capture antibody was pre coated on a high affinity microplate. Add the standard, the sample to be tested and the biotin labeled detection antibody into the wells of the enzyme plate in turn, shake well and mix well, and then place it at room temperature for 2 hours of incubation process. The IL-21 in the sample is combined with the solid-phase antibody and detection antibody. After washing sufficiently to remove free and unbound components, streptavidin HRP (sa-hrp) labeled with horseradish peroxidase was added. After washing, signal enhancer was added for incubation. After washing to remove unbound material, sa-hrp was added again. After washing again, TMB chromogenic substrate was added and incubated at room temperature in the dark to develop color. The depth of color response is positively correlated with the concentration of IL-21 in the sample. Add stop solution to stop the reaction, and use a microplate reader to measure the absorbance value at 450 nm detection wavelength (correction wavelength 570-630 nm).

Detection Type: Double antibody sandwich method

Form: Pre coated 96 well plate

Test Sample Type: cell supernatant, serum, plasma

Loading Amount: 100 μ L

Kit Components: A copy of pre coated 96 well plate, standard, IL-21 detection antibody, standard dilution, detection buffer, signal enhancer, signal enhancer dilution, TMB chromogenic substrate, washing solution, termination solution, sa-hrp, plate sealing membrane and instructions.

Sensitivity: 1.03pg/ml

Detection Range: 9.38-600 pg/ml

Recovery Range: 90-116%

Storage Method: 2-8 ℃

Standard Curve:

Background:

Interleukin 21 (IL-21) has a strong regulatory effect on immune cells, including natural killer cells (NK) that can destroy virus infection or tumor cellsAnd cytotoxic T cells. This cytokine can induce target cell division / proliferation. IL-21 is expressed on human activated cd4+ T cells, but not in most other tissues. In addition, IL-21 was upregulated in helper T cell subsets Th2 and Th17 cells as well as follicular T cells. Moreover, IL-21 is also expressed in NK T cells that regulate the functions of these cells. IL-21 has a pathological role in immune inflammatory diseases. Studies have shown that there is a positive autocrine loop that can amplify and stabilize il-21-driven, T cell-mediated responses. Moreover, it also has anti-tumor activity and plays a role in the process of autoimmunity. In clinic, IL-21 can also be used as a potential antitumor drug.

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SKU: 51643452373

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Christine work
Waukegan, US
★★★★★ 5
Moisturizing
Scent: Unscented, Size: 8 Ounce (Pack of 1)
A little goes a very long way with this product. It feels amazing and makes my skin so soft. It pairs well with my snail mucin. My skin looks beautiful. Just be careful not to use too much copilot said it can cause breakouts but I’ve been using it every other day for a week now with no break outs. I also pair it with a beef tallow serum.
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Reviewed in the United States on June 7, 2026
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Chelsea, US
★★★★★ 1
Sand paper residue
Scent: Unscented, Size: 8 Ounce (Pack of 1)
I ordered this in march just started to use it. I’m not sure if I got a bad batch according to reviews, however it’s like rubbing on sand paper it leaves a white residue on your skin . After it heats up you can rub most of it in but I wouldn’t reorder. It does moisturizer but the sandpaper feeling is not worth the trouble. :(
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Reviewed in the United States on May 15, 2026
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Caprireneedecordova
Los Angeles, US
★★★★★ 5
Perfect moisturizer
Scent: Unscented, Size: 8 Ounce (Pack of 1)
This stuff is good. It doesn't have a smell at all, so it's not irritating at all. it feels so good and a little does go a long ways. it's such a good price for a good amount compared to others that is half the size and twice the price. Simple very good ingredients. Love love love. A must have.
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Reviewed in the United States on May 1, 2026
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Melissa
Lake Worth, US
★★★★★ 5
THIS IS A MIRACLE PRODUCT!!!
I had a really bad reaction from Sunbum , which is apparently not a rare phenomenon. My lips swelled and blistered and were so painful I could hardly talk. Everything I tried just stung so I was desperately looking for something natural to help cure them quickly. Castor oil helped soothe them but it was very temporary and topical and I had to reapply every 5 minutes it seemed like. This actually soothed and repaired them almost immediately. I felt such relief, I can't say enough about how happy I was to find this product. It was same-day delivery which was part of the miracle. I was in pain for days so it's nice to finally smile again and tell you this was a life saver! THANK YOU!!!
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Reviewed in the United States on October 11, 2024
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Jonathan Burkeen
Waukegan, US
★★★★★ 5
Already ordered more
Love it. So smooth and lasts for a while. Great for lips that chap all of the time.
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Reviewed in the United States on December 13, 2025

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