SKU: 41452901099

UniOne® TR-FRET Human IL21/IL21R Binding Kit

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Description

UniOne® TR-FRET Human IL21/IL21R Binding KitProduct Specification Host Human Stability & Storage 80 Background This kit utilizes Homogeneous Time Resolved Fluorescence(TR FRET) technology to measure the interaction between IL21 and IL21R. Thismethod enables simple and rapid high throughput screening of inhibitors andantibody blockers. As illustrated, the interaction between IL21 and IL21R isdetected using an Eu labeled anti Tag1 antibody (TR FRET donor) and anAcceptor labeled anti Tag2 antibody

Product Specification


Host Human
Stability & Storage

-80℃

Background

This kit utilizes Homogeneous Time-Resolved Fluorescence(TR-FRET) technology to measure the interaction between IL21 and IL21R. Thismethod enables simple and rapid high-throughput screening of inhibitors andantibody blockers.

As illustrated, the interaction between IL21 and IL21R isdetected using an Eu-labeled anti-Tag1 antibody (TR-FRET donor) and anAcceptor-labeled anti-Tag2 antibody (TR-FRET acceptor). The binding of IL21 toIL21R brings the donor and acceptor antibodies into proximity. Excitation ofthe donor antibody then triggers Fluorescence Resonance Energy Transfer (FRET)to the acceptor antibody, resulting in a specific emission signal at 665 nm.The intensity of this specific signal is proportional to the extent of theIL21/IL21R interaction. This homogeneous assay is simple to perform andrequires no washing steps.



Components

Table 1. Kit Components and Storage Temperature

Component

Concentration

500 TESTS

2500 TESTS

10000 TESTS

Storage Temp.

Tag1-IL21 protein

100×

20μL

100μL

400μL

-80°C

Tag2-IL21R protein

100×

20μL

100μL

400μL

-80°C

Anti-Tag1 Eu dye antibody

50×

50μL

250μL

1000μL

-80°C

Anti-Tag2 Ac antibody

12.5×

200μL

1000μL

4000μL

-80°C

Detection buffer

10×

2mL

10mL

40mL

-80°C

*Reagents should be protected from repeated freeze-thaw cycles. It is recommended to aliquot upon first thaw and store under the specified conditions. The shelf life is one year.

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SKU: 41452901099

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Laurie’s honest review
Bozeman, US
★★★★★ 5
Sturdy and well priced
Size: Large 1/2in x 6ft-Rope Clasp, Color: Black
Amazed at the great quality of this leash, very sturdy and reasonably priced. I use it for off leash training, as a leash drag and miraculously it does not pick up any trail debris.
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Reviewed in the United States on October 16, 2025
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Mahalo5ivo
Bozeman, US
★★★★★ 5
Solid value!
Size: Large 1/2in x 6ft-Rope Clasp, Color: Orange, Size: Large 1/2in x 6ft-Rope Clasp, Color: Orange
Nice quality leash, good price. Clasp is heavy duty and should handle beach duty. Would buy again in another color.
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Reviewed in the United States on December 3, 2025
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Brat
Omaha, US
★★★★★ 4
Ok not as well made as I was expecting
Pretty color . Lighter than expected and cheap looking pleather on the connectors
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Reviewed in the United States on October 22, 2025
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KK
Los Angeles, US
★★★★★ 5
It is indeed comfortable
Size: Large 1/2in x 6ft-Rope Clasp, Color: Light Blue
I really like this leash. The color is vibrant and I have experienced zero fading even though I leave it outside. I really appreciate the padded handle and the entire leash is a good substantial weight - I hate a flimsy leash. I would not hesitate to purchase this again if needed.
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Reviewed in the United States on April 11, 2026
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Nicole
Louisville, US
★★★★★ 5
Perfect
Size: 2PCS Large 1/2in x 6ft-Rope Clasp, Color: Blue
The handle is comfortable. Looks adorable too!
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Reviewed in the United States on May 24, 2026

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