SKU: 69883018855

NPT (Neopterin) ELISA Kit

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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

NPT (Neopterin) ELISA KitThe NPT (Neopterin) ELISA Kit measures NPT in Universal Serum, Plasma, Cell Culture Supernatant, Cell or Tissue Lysate. This kit is based on Competitive ELISA detection method and takes 2h assay time. The microplate provided in this kit has been precoated with NPT. NPT in the sample or standard competes with a fixed amount of biotin labeled NPT for sites on a pre coated antibody specific to NPT. Free components are washed off. After adding HRP

The NPT (Neopterin) ELISA Kit measures NPT in Universal Serum, Plasma, Cell Culture Supernatant, Cell or Tissue Lysate. This kit is based on Competitive-ELISA detection method and takes 2h assay time. The microplate provided in this kit has been precoated with NPT. NPT in the sample or standard competes with a fixed amount of biotin-labeled NPT for sites on a pre-coated antibody specific to NPT. Free components are washed off. After adding HRP-Streptavidin Conjugate (SABC), biotin specifically binds with streptavidin to form immune complexes. Wash off unbound conjugate. 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. Compare OD450 value of sample with the standard curve through curve fitting software to determine the concentration of NPT in the sample. The concentration of the target substance is inversely proportional to the OD450 value.

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SKU: 69883018855

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PrimoCat
Waukegan, US
★★★★★ 5
Difficult to destroy. Bounce really high.
Style: Squeaker, Size: Small (2 Pack)
Bought as a gift for a friend's small dog who dismantles tennis balls. He loves them. I have many years of experience with the product (in a larger size) for my big dog. He always had one either in his mouth or near him. They are pretty much indestructible.
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Reviewed in the United States on May 13, 2026
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Majesty
Waukegan, US
★★★★★ 4
High quality, wish it was just a little smaller
Style: Squeaker, Size: Small (2 Pack)
Love these. My dogs would play ball all day if I let them. These are very durable and bouncy. Love that it’s washable. They would chew up the small “tennis” balls to pieces so I love that they can’t destroy these. My only criticism is I wish these were just a little smaller (like the size of the small Kong tennis balls). My dogs can carry it in their tiny mouths but they can’t get their mouth around it enough to chew it to get the squeaker to squeak, which is their favorite thing.
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Reviewed in the United States on January 5, 2026
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CA Goose
Carnegie, US
★★★★★ 5
Perfect for little dogs
Style: Ultra, Size: Small (2 Pack)
Perfect size for my 13 pound chihuahua mix. Great bounce and quality feel. Definitely worth it.
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Reviewed in the United States on March 26, 2026
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Amazon Customer
Los Angeles, US
★★★★★ 5
The perfect ball for a small to medium dog.
Style: Ultra, Size: Small (2 Pack)
My dog's favorite ball. Perfect size for playing catch and return for a small dog. She loves to chew on the ball. Very durable she has not been able to shred the ball. A great entertainment value. This ball does not squeak.
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Reviewed in the United States on February 27, 2026
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Kristy Kelly
West Palm Beach, US
★★★★★ 5
High quality, dogs love them
Style: Ultra, Size: Medium (1 Pack)
My dogs are obsessed with these balls! We've had them for months and they're still good as new. High quality!
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Reviewed in the United States on April 5, 2026

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