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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Pamela
Chelsea, US
★★★★★ 5
Best cheap comforter I’ve ever purchased
Color: White, Size: King, Color: White, Size: King
The comforter made of super soft and comfortable! It’s definitely cat approved, my kitty immediately fell asleep on this amazing comforter. It was super cheap. It’s easy to clean and handles bleach great. Fits my duvet cover perfectly.
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Reviewed in the United States on May 6, 2026
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Kyle R.
Massapequa, US
★★★★★ 4
Solid Affordable Duvet Insert Comforter
Color: White, Size: Queen
This is a great affordable all-season duvet insert comforter. There are multiple tie downs to attach to the duvet cover, not just the 4 corners. It is soft and washes well. It's plenty warm in the cold but might be too much during the hotter months. I live in San Diego where the average yearly temperature is at least 70 degrees. During the majority of the year this comforter ended up being too warm for me. I've used it for nearly 2 years but just replaced it with the much thinner Bedsure cooling comforter. If you're a hot sleeper or live in a warm climate, I'd recommend that product. This is still a good comforter, just not for me.
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Reviewed in the United States on March 30, 2026
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Jessie
Natrona Heights, US
★★★★★ 5
Great quality and price
Color: Grey, Size: King
We love these comforters! They are super comfy! Perfect weight. Not too thick or too thin! Great price!
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Reviewed in the United States on May 25, 2026
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Ann
Dallas, US
★★★★★ 5
Great Comforter for Warmer Weather
Color: Aqua, Size: Twin XL
I purchased the Bedsure Comforter Duvet insert and I love it. I think it's meant for a duvet insert but it works just as well as a blanket. It's light and not too warm so it's perfect for the warmer months. The material is soft and plush but not too thick. I have one is lavender and I just bought one for my son in light blue. Love all the pretty colors. I'd highly recommend.
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Reviewed in the United States on May 27, 2026
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Pam
Massapequa, US
★★★★★ 5
Not Bulky, Not Too Warm
Color: White, Size: Twin
This is a great comforter. I have purchased others that were way too bulky. This one is perfect. It is lightweight and seems ideal for warmer temperatures. I am not too hot in the middle of the night. We are heading into Summer but I am sure this will be fine for Summer heat or for Air Conditioners.
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Reviewed in the United States on May 7, 2026

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