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900483

Sigma-Aldrich

Gold nanoparticles

100 nm, NHS ester functionalized, conjugation kit

Sinônimo(s):

NHS-activated gold nanoparticles

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About This Item

Código UNSPSC:
12141717
NACRES:
NA.23

forma

nanoparticles

prazo de validade

12 mo. at -20 °C (If stored unopened and as specified, are stable for at least 12 months)

embalagem

pkg of 1 ea

condição de armazenamento

protect from light

tamanho de partícula

100 nm

λmax

572 nm

grupo funcional

NHS ester

temperatura de armazenamento

−20°C

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Descrição geral

Gold nanoparticles, 100 nm, NHS ester functionalized, conjugation kit is a comprehensive kit that enables easy, one-step conjugation of your amine-containing ligands to 100 nm gold nanoparticles. The kit includes pre-made mixtures of lyophilized (freeze-dried) NHS-activated gold nanoparticles, along with all the necessary materials for three independent conjugation reactions. The kit components comprise:
•3 vials of 100 nm NHS-Activated Gold Nanoparticles (lyophilized)
•Protein Resuspension Buffer - 1.5ml
•Reaction Buffer - 1.5ml
•Quencher Solution - 1.5ml
•Reaction protocol
The gold nanoparticles in this kit are supplied as a lyophilized (freeze-dried) mixture. The conjugation reaction is initiated by simply reconstituting the freeze-dried nanoparticles with the protein of interest, which attaches to the nanoparticle surface via lysine residues.
The gold conjugation procedure has a quick hands-on time of around 10 minutes, and the conjugate is fully ready for use within 3 hr. Researchers only need to pipette the biomolecule into a vial containing the nanoparticles, quench the reaction, and perform product washing through microcentrifugation.
The provided protocol is optimized for highly efficient covalent conjugation, resulting in stable gold nanoparticle conjugates. Optional protocol steps involve additional materials, such as 10% aqueous BSA (126615) and Tris saline resuspension buffer (PPB002), which are sold separately.

Aplicação

This gold conjugation kit streamlines the process of conjugating your proteins or biomolecules to 100 nm gold nanoparticles. Gold conjugation helps researchers to visualize and assay a specific protein or antibody of interest. Gold conjugates are useful in a wide range of applications like lateral flow testing, immunoblotting, immuno-electron microscopy, immunohistochemical staining, and other bio-assays. Different sizes of gold nanoparticles perform better in specific applications. For lateral flow and flow cytometry, we recommend using gold nanoparticles with diameters between 20 nm and 100 nm. For immunoblotting or immuno-electron microscopy, the optimal range is 5 nm to 40 nm. For bioassays utilizing dynamic light scattering, gold nanoparticles with diameters ranging from 60 nm to 100 nm are suggested.

Características e benefícios

•The resulting covalent conjugates offer greater stability compared to those prepared using passive adsorption methods.
•Fast and convenient conjugation reaction with no need for pre-activation.
•A spacer between the gold nanoparticle surface and the conjugated ligand minimizes the impact on the tertiary protein structure. This reduces the likelihood of poor performing conjugates, a common issue encountered with conjugates prepared by passive adsorption.
•Gold surface coating is precisely engineered to minimize non-specific protein binding in biological assays.

Componentes

NHS-Activated Gold Nanoparticles Protein Re-suspension Buffer Reaction BufferQuencher Solution

propriedades físicas

NHS ester surface density: ~1/nm2

Informações legais

Product of CytoDiagnostics, Inc.

Código de classe de armazenamento

10 - Combustible liquids

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable


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Kumar SS, et al.
Electrochemical Communications, 19, 123-126 (2012)
Recent advances in nanoparticle-based lateral flow immunoassay as a point-of-care diagnostic tool for infectious agents and diseases
Banerjee R and Jaiswal A
Analyst, 143(9), 1970-1996 (2018)

Artigos

Drs. Fernandes and Baptista explore the synthesis and functionalization of gold nanoparticles and their use in molecular diagnostics, focusing on lateral flow assays. They further discuss the regulations and standards of these materials, as well as the future outlook and challenges.

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