Passive Binding Surfaces

A wide variety of surfaces are available for performance optimization

Passive surfaces have a broad range of applications as they can bind to a variety of biomolecules. Passive binding is primarily suited for the immobilization of medium- to large-sized molecules, such as antibodies, which are capable of establishing several contact points. The exact molecular interaction sites are dependent on the specific matching of the biomolecule's structure with the polymer surface structure. A large variety of biomolecules can be immobilized on passive surfaces with good residual activity.

Application Notes for Passive Adsorption

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Passive binding surface categories

These surfaces are typically used for the adsorption of hydrophobic molecules such as lipid-rich biomolecules.

Slightly hydrophilic
The slight hydrophilicity of these plates enhances their ability to bind a diverse range of biomolecules, including glycoproteins, serum-containing samples, and amphoteric molecules such as lipopolysaccarides. With these plates, non-specific adsorption of serum-containing samples is reduced, and this will improve the signal-to-noise (S/N) ratio and consequently, sensitivity levels.

Passive Binding Surface Categories

Optimized to bind high amounts of IgG (polyclonal), these plates are ideal for antibody sandwich assays (e.g., ELISAs). In addition, they show increased binding of many other proteins and biomolecules that possess hydrophilic/hydrophobic characteristics.

Very hydrophilic
The most hydrophilic in our portfolio, many hydrophilic proteins will bind with a high affinity to these plates. Binding does, however, tend to be more pH sensitive.