SKU: 4946724142

Human CD21 (Complement Receptor 2) ELISA Kit

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Description

Human CD21 (Complement Receptor 2) ELISA KitThe Human CD21 (Complement Receptor 2) ELISA Kit measures CD21 in Human Serum, Plasma, Cell Culture Supernatant, Cell or Tissue Lysate. This kit is based on Double antibody Sandwich ELISA detection method and takes 4h assay time. The microplate provided in this kit has been precoated with anti CD21 antibody. Add standard and properly diluted sample into relevant well respectively. After incubation, wash unbound components. Add biotinylated detection

The Human CD21 (Complement Receptor 2) ELISA Kit measures CD21 in Human Serum, Plasma, Cell Culture Supernatant, Cell or Tissue Lysate. This kit is based on Double antibody-Sandwich ELISA detection method and takes 4h assay time. The microplate provided in this kit has been precoated with anti CD21 antibody. Add standard and properly diluted sample into relevant well respectively. After incubation, wash unbound components. Add biotinylated detection antibody. Then, it binds with CD21 bound to precoated antibody. Wash unbound components and add HRP-Streptavidin Conjugate (SABC). Wash unbound components again and add TMB substrate solution. Then, TMB was catalyzed by HRP to produce a blue color product that turned yellow after adding a stop solution. Read the O.D. absorbance at 450nm in a microplate reader. Calculate the concentration of CD21 in the sample by plotting standard curve. The concentration of the target substance is proportional to the OD450 value.

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SKU: 4946724142

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4.7 ★★★★★
Based on 89 reviews
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Verified Purchase
dd
Draper, US
★★★★★ 5
An effective organizing solution for missions involving movable equipment
Size: Medium 16in x 1in
Following the compromised operation in Prague, I was tasked with organizing equipment for the embassy annex in Vienna. The VELCRO Brand Magnetic Straps provided an essential solution for securing various tools and equipment to metal surfaces, facilitating quick access during critical moments. The durability of the strap, combined with an impressively strong magnet, ensured that our gear remained in place despite variable operational conditions. However, the loop formed by the strap could be larger; it limited our options for certain garden hoses, which became a notable drawback. Overall, the robust quality of the straps enhances logistical efficiency in high-pressure scenarios. Katarina's earlier input on this product proved beneficial, although I detected apprehension in her demeanor while discussing its application. Recommendation: An effective organizing solution for missions involving movable equipment, with minor adjustments needed for cord size.
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Reviewed in the United States on December 30, 2025
K
Verified Purchase
Kindle Customer
Alexandria, US
★★★★★ 5
Sturdy and Reliable
Size: Medium 16in x 1in
Very sturdy and holds up well with regular use. It feels solid and well-made, not flimsy or like it’s going to wear out quickly. Definitely something you can rely on without worrying about it falling apart.
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Reviewed in the United States on May 1, 2026
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Verified Purchase
Frank Fortino
Bozeman, US
★★★★★ 5
Very strong magnet
Size: Large 24in x 1.25in
Great product,, very secure and the long strap allows you to hang a variety of items.
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Reviewed in the United States on April 19, 2026
M
Verified Purchase
MelissaMH
Lake Worth, US
★★★★★ 5
Buy This!
Size: Medium 16in x 1in
Super heavy duty! Not only does the magnet hold a ton, the strap is totally adjustable to hold wide items. Currently it's holding an 8 ish lb rope on the side of my garage fridge with zero issue! Easy to use and works great!
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Reviewed in the United States on December 18, 2025
C
Verified Purchase
C.F.W.
Belleville, US
★★★★★ 4
"Keep On Holding On" assist.
Size: Medium 16in x 1in
Magnet is powerful indeed . The velcro strap is quite long and I have not figured out how to shorten it without cutting it. Great for hoses, ropes, and pull alongs. Temporary use as hold down in a truck bed for lite items.
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Reviewed in the United States on November 9, 2025

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