Polystreptavidin Protéine
Origine: Streptomyces avidinii
Hôte: Streptomyces avidinii
Native
Coat, ELISA, Func, LF
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- Antigène
- Polystreptavidin (Poly Streptavidin)
- Type de proteíne
- Native
- Origine
- Streptomyces avidinii
- Source
- Streptomyces avidinii
- Application
- Coating (Coat), ELISA, Functional Studies (Func), Lateral Flow (LF)
- Fonction
- Polymerized Streptavidin
- Attributs du produit
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Polystreptavidin is a chemically modified, polymerized form of Streptavidin distinguished by its exceptionally high biotin-binding capacity. When applied as a coating on solid surfaces, Polystreptavidin provides a versatile platform for immobilizing and detecting a wide range of biotinylated molecules—including proteins, peptides, PCR fragments, haptens, and more.
These coatings combine outstanding binding efficiency with excellent chemical and thermal stability, along with an extended shelf life. Polystreptavidin is ideal for use on various substrates such as membranes, beads, biochips, and plastic materials, offering a robust and reliable solution for diverse analytical and diagnostic applications. - Purification
- Dialysis
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- Indications d'application
- Lateral Flow Assay (LFA): 2 mg/mL in PBS
- Commentaires
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Binding affinity: Ka = 1015 M-1
- Restrictions
- For Research Use only
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- Format
- Liquid
- Concentration
- 5 mg/mL
- Buffer
- 5 mM PBS, 0.09% Sodium azide
- Agent conservateur
- Sodium azide
- Précaution d'utilisation
- This product contains Sodium azide: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.
- Stock
- 4 °C
- Stockage commentaire
- 2 to 8 °C. Do not freeze!
- Date de péremption
- 6 months
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- Antigène
- Polystreptavidin (Poly Streptavidin)
- Autre désignation
- PolyStreptavidin
- Sujet
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Streptavidin is a tetrameric protein, composed of four subunits of approximately 13 kDa each, that exhibits an exceptionally strong affinity for the small molecule biotin. This interaction ranks among the most robust non-covalent bonds in biology and remains stable under extreme conditions such as high temperatures, varying pH levels, and exposure to solvents or other chemicals. Biotin can effectively outcompete most other ligands for streptavidin binding and can be easily linked to a variety of biomolecules, making this system highly versatile and widely used—especially in immunoassay applications.
A single streptavidin molecule is capable of binding up to four biotin or biotinylated proteins. However, the use of Polystreptavidin allows for the attachment of significantly more biotin molecules per complex. This enhanced binding capacity can lead to lower background noise, improved signal strength and specificity, and reduced reagent costs during the development and optimization of immunoassays.
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