Avidin/Streptavidin-Biotin Reagents

Avidin/Streptavidin – Biotin Reagents

Avidin is a tetrameric protein originally isolated from chicken egg white evincing high binding affinity to biotin (Vitamin B7, earlier Vitamin H). Streptavidin on the other hand is of bacterial origin and has been isolated from bacterium Streptomyces avidinii. Similarly to avidin, streptavidin also shows high affinity to biotin, although both proteins share only about 30% homology. Despite their very similar secondary, tertiary and quaternary structure, both avidin and streptavidin vary from each other. Avidin is a larger, glycosylated molecule, which may cause nonspecific binding, especially with lectins. At a neutral pH it carries a positive charge, which may interact with negatively charged molecules such as DNA in the nucleus.

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  1. Streptavidin HRP (0.25mg/ml), CE-IVD
    Streptavidin HRP (0.25mg/ml), CE-IVD
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    Sku SCYABL001
    Manufact. SkuABL001
    Packaging Unit1 ml
  2. Streptavidin: SureLight® R-PE
    Streptavidin: SureLight® R-PE
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    Sku CAY13434-25
    Manufact. Sku13434-25
    Packaging Unit25 mg
  3. Streptavidin: SureLight® R-PE
    Streptavidin: SureLight® R-PE
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    Sku CAY13434-100
    Manufact. Sku13434-100
    Packaging Unit100 mg
  4. 40 nm Colloidal Gold-Streptavidin
    40 nm Colloidal Gold-Streptavidin
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    Sku JAC016400084
    Manufact. Sku016-400-084
    Packaging Unit1 ml
  5. NEUROBIOTIN® Tracer
    NEUROBIOTIN® Tracer
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    Sku VECSP-1120
    Manufact. SkuSP-1120-50
    Packaging Unit50 mg
  6. NEUROBIOTIN® Tracer
    NEUROBIOTIN® Tracer
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    Sku VECSP-1120-20
    Manufact. SkuSP-1120-20
    Packaging Unit20 mg
  7. Streptavidin, Peroxidase, R.T.U.
    Streptavidin, Peroxidase, R.T.U.
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    Sku VECSA-5704
    Manufact. SkuSA-5704-100
    Packaging Unit100 ml
  8. Streptavidin, DyLight™ 649
    Streptavidin, DyLight™ 649
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    Sku VECSA-5649
    Manufact. SkuSA-5649-1
    Packaging Unit1 mg
  9. Streptavidin, DyLight™ 594
    Streptavidin, DyLight™ 594
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    Sku VECSA-5594
    Manufact. SkuSA-5594-1
    Packaging Unit1 mg
  10. Streptavidin, DyLight™ 549
    Streptavidin, DyLight™ 549
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    Sku VECSA-5549
    Manufact. SkuSA-5549-1
    Packaging Unit1 mg
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