Human IL-21 ELISA Kit
SKU: 33691315197

Human IL-21 ELISA Kit

$267.75 $297.50
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Description

Human IL-21 ELISA KitThe Human IL 21 ELISA kit is a sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre coated with an antibody specific to Human IL21. Standards or samples are added to the appropriate microtiter plate wells then with a biotin conjugated antibody specific to Human IL21. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those

The Human IL-21 ELISA kit is a sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Human IL21. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human IL21. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Human IL21, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Human IL21 in the samples is then determined by comparing the OD of the samples to the standard curve.

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SKU: 33691315197

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4.1 ★★★★★
Based on 535 reviews
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Hummingbird
New York, US
★★★★★ 5
My Dog Loves Them
Color: Multi Squeaker Balls, Size: Small, Style: 8-Pack
These cute little squeaky balls are the perfect size for my Shih Tzu. She loves to chew on them and make them squeak all the time, so they are durable. I would purchase them again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
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AC
West Palm Beach, US
★★★★★ 3
Not super durable but good squeak while they work
Color: Multi Squeaker Balls, Size: Large, Style: 4-Pack
My dog loves these but they break very quickly. I've got an older set that was incredibly durable, but these all stopped squeaking/got holes after the first or second play session
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Reviewed in the United States on May 30, 2026
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Verified Purchase
Nathaniel Bornstein
Birmingham, US
★★★★★ 5
Endless Fun and Excitement: Outward Hound Squeaker Ballz Fetch Dog Toy Review
Color: Multi Squeaker Balls, Size: Medium, Style: 4-Pack
f you're searching for the ultimate entertainment solution for your furry friend, look no further than the Outward Hound Squeaker Ballz Fetch Dog Toy. As a proud dog owner, I can attest to the sheer joy and excitement that these toys bring to our canine companions. Here's why the Outward Hound Squeaker Ballz Fetch Dog Toy deserves all the praise: Irresistible Squeaky Fun: The Outward Hound Squeaker Ballz are an absolute delight for dogs of all shapes and sizes. Each ball features an attention-grabbing squeaker that ignites your pup's natural instincts for play and exploration. The squeaky sound adds an extra layer of excitement to fetch games, encouraging hours of active and engaging playtime. Durable Construction: Made from high-quality, durable materials, the Outward Hound Squeaker Ballz are built to withstand the rigors of enthusiastic play. Whether your dog loves to chase, fetch, or chew, these toys hold up remarkably well against rough handling and gnawing, ensuring long-lasting enjoyment and entertainment for your furry friend. Versatile Play Options: With a convenient pack of four medium-sized balls, the Outward Hound Squeaker Ballz offer endless opportunities for interactive play and bonding with your dog. Whether you're playing indoors or outdoors, these versatile toys provide a fun and engaging outlet for your dog's energy, helping to promote physical activity and mental stimulation. Bright and Colorful Design: The vibrant colors and eye-catching design of the Outward Hound Squeaker Ballz make them easy to spot and retrieve during outdoor play sessions. Their bright hues add an element of excitement to fetch games, keeping your dog entertained and focused on the task at hand. Safe and Non-Toxic: As responsible pet owners, we prioritize the safety and well-being of our furry companions. The Outward Hound Squeaker Ballz are crafted from pet-safe materials that are free from harmful chemicals and toxins, providing peace of mind knowing that your dog is playing with a safe and non-toxic toy. Affordable and Value-Packed: With four balls included in each pack, the Outward Hound Squeaker Ballz offer exceptional value for the price. You can keep multiple balls on hand for backup or share them with fellow dog owners, spreading the joy and excitement of playtime to canine friends everywhere. In conclusion, the Outward Hound Squeaker Ballz Fetch Dog Toy is a must-have addition to any dog owner's collection of pet supplies. With their irresistible squeaky fun, durable construction, versatile play options, bright and colorful design, safety features, and unbeatable value, these toys bring endless joy and entertainment to dogs of all ages and breeds. Treat your furry friend to the ultimate playtime experience with Outward Hound Squeaker Ballz Fetch Dog Toy - you won't be disappointed!
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Reviewed in the United States on February 27, 2024
S
Verified Purchase
Stacie☺
Los Angeles, US
★★★★★ 5
Fun solid ball
Style: Recharges, Size: Medium, Style: Recharges, Size: Medium
Great squeaky balls! Glow doesn’t last for a long time, but they go far in the Chuck it. Solid ball, my dog doesn’t seem to destroy them.
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Reviewed in the United States on February 11, 2026
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Verified Purchase
Jennifer Gugala
Cuba, US
★★★★★ 5
Great ball!
Style: Recharges, Size: Medium
The dog loves chasing it! Walks around sqeeking it all the time. And bonus, I can see it in the middle of the floor when I get up in the middle of the night so I won't unknowing step on it.
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Reviewed in the United States on May 5, 2026

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