SKU: 97406894398

Sheep CD4 (Cluster of Differentiation 4) ELISA Kit

Sale price$202.50 Regular price$225.00
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

Sheep CD4 (Cluster of Differentiation 4) ELISA KitThe Sheep CD4 (Cluster of Differentiation 4) ELISA immunoassay kit uses the Sandwich ELISA principle. The micro ELISA plate provided in this kit has been pre coated with an antibody specific to Sheep CD4. Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Sheep CD4 and Avidin Horseradish Peroxidase (HRP) conjugate are added successively to each

The Sheep CD4 (Cluster of Differentiation 4) ELISA immunoassay kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Sheep CD4. Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Sheep CD4 and Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Sheep CD4, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Sheep CD4. You can calculate the concentration of Sheep CD4 in the samples by comparing the OD of the samples to the standard curve.

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SKU: 97406894398

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Laurie Janelle
Bozeman, US
★★★★★ 5
Strong ball for Strong chewer!
Perfect Size. This foster pitbull likes to tear stuff up, this ball has not ended up in the garbage like so many others have.
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Reviewed in the United States on January 20, 2026
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Verified Purchase
Koda James
Battle Creek, US
★★★★★ 5
Good Toy Reward for Training
Size: Medium, Size: Medium
A great non-food reward for dog training and play! It’s the perfect size for my German Shepherd and the tie makes it easy to carry and play tug. It’s also been very durable for her sharp teeth!
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Reviewed in the United States on May 11, 2026
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Verified Purchase
Melissa in JAX
Dallas, US
★★★★★ 2
Didn’t last long
Size: Medium, Size: Medium
One of my puppies chewed the rope apart within an hour. They still have one of the balls and play with it often.
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Reviewed in the United States on May 3, 2026
P
plumber@1024
Phoenix, US
★★★★★ 4
Good for playing tug of war, but better with a knotted handle
Size: Medium, Size: Medium
Strong and durable rope ball. I use it to play tug with my Doberman Pinscher -- at least until she decides that she's taking it, then she does!! The size is good, list of price is a good value for two, and my dog has a lot of fun with it. As you can see in the picture, there was not a knotted handle at the end. I was never a boy scout and don't know my knots and so anything I try to tie comes apart when we start playing. It would be nice if it came as it looked in the listing: with a knotted loop at the end.
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Reviewed in the United States on February 3, 2026
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Toasty
West Palm Beach, US
★★★★★ 4
Pricey for quality but my dogs love them!
Size: Medium, Size: Medium
This toy is a bit on the pricey side for what it is, and no matter how many times I try to tie it, I just cannot get it to stay secured. I really like the idea behind it, but the overall quality feels just okay rather than amazing. The ball itself is very lightweight and almost feels more like a dense foam than traditional rubber, which initially threw me off. That said, it has actually been holding up well with regular use, which is a pleasant surprise. Most importantly, my puppies absolutely love these. The biggest win for me is that it comes as a two pack, which means I can play with both dogs at the same time without anyone feeling left out. At the end of the day, my girls are happy, and that makes me happy too.
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Reviewed in the United States on January 20, 2026

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