SKU: 36725080517

CTRB1 (Chymotrypsinogen B1) ELISA Kit (Small Sample)

$267.93 $297.70
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Description

CTRB1 (Chymotrypsinogen B1) ELISA Kit (Small Sample)The CTRB1 (Chymotrypsinogen B1) ELISA Kit is a Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre coated with an antibody specific to Human CTRB1. Standards or samples are added to the appropriate microtiter plate wells then with a biotin conjugated antibody specific to Human CTRB1. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is

The CTRB1 (Chymotrypsinogen B1) ELISA Kit is a Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Human CTRB1. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human CTRB1. 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 CTRB1, 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 CTRB1 in the samples is then determined by comparing the OD of the samples to the standard curve.

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SKU: 36725080517

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4.2 ★★★★★
Based on 1510 reviews
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Daniel Riser
Louisville, US
★★★★★ 5
The best laptop sleeve I've ever owned!
Color: Black, Size: 13-inch for New MacBook Air & Pro
I love this sleeve. Every time I get a new laptop, I buy this exact one. I have one for my work laptop and one for my personal laptop. It’s made from a high-quality outer shell with an equally nice inner lining that’s velvety soft and keeps expensive devices safe. The sleeve is padded on all sides, so no matter what angle you drop it from (and I have), your laptop stays secure. If you have a favorite bag that doesn’t include a padded laptop compartment, this will quickly become your best friend. It also features a generous front zippered pocket for chargers, hard drives, and cables. Check out my video to see the capacity—you can easily fit a full-size charger, multiple cables, and external hard drives. A couple of other things I love about this case: it’s easy to clean (just a damp cloth with a little soap), and it’s incredibly durable. I bought my first one almost 10 years ago, and it’s still going strong. The zipper action is still flawless. For reference, the sleeve in my video is holding a 2025 13-inch MacBook Air, but I have the same sleeve for a 13-inch MacBook Pro, and it fits both beautifully. I can’t recommend this sleeve enough.
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Reviewed in the United States on January 14, 2026
A
Verified Purchase
Alan Gabriel Jones
Carnegie, US
★★★★★ 5
Sturdy, high quality, and protective
Color: Green, Size: 15-inch for New MacBook Air
This is my third TomToc laptop sleeve. Each time, I bought another, less expensive brand first and returned it. TomToc offers the best protection in a soft-shell sleeve. Immediately when you open it, you feel the higher quality material and density. It’s not heavy, but it is thick padded and doesn’t easily bend with pressure. The zipper is built to last, sturdy, and easy to operate without that chintzy feeling from cheap zippers. If you pay attention to the construction, you quickly see why it’s about double in price. There is an inner pad to protect the laptop from not just drops and shock, but also from the zipper. The corners are reinforced and add extra protection. It is definitely worth double the price.
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Reviewed in the United States on April 11, 2026
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Bamagreek
Omaha, US
★★★★★ 5
Great Protection
Color: Orange, Size: 13-inch for New MacBook Air & Pro
This is a very nice, protective case. The material is thick and cushions the laptop great! Computer fits nice and cozy; great fit. I love the bright orange! I highly recommend.
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Reviewed in the United States on April 23, 2026
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AmazonUser
Chelsea, US
★★★★★ 5
Great Laptop Case !
Color: Black, Size: 13-inch for New MacBook Air & Pro
This case is reallllly nice and durable, the cushioned corners is what really makes this case special imo. The outer layer is a nice durable think fabric. It fits perfectly. The only downside is the zipper traction is not as smooth as I would like ,,, but I guess I can fix that with some oil/wd40. I would recommend this laptop case ! 👌🏽👌🏽👌🏽
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Reviewed in the United States on March 24, 2026
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IceCreamTaco
Belleville, US
★★★★★ 5
It’s perfect!
Color: Light Blue, Size: 15-inch for New MacBook Air, Color: Light Blue, Size: 15-inch for New MacBook Air
This case matches my MacBook Air perfectly! It’s definitely going to protect your laptop and it’s really well built and designed. So glad I went with this case than the other brands!
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Reviewed in the United States on May 18, 2026

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