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Streptavidin (SA-5000-1)



Streptavidin is a 60 kDa non-glycosylated protein composed of four identical subunits, each of which has a binding site for biotin. Our streptavidin is isolated from Streptomyces avidinii by a specific affinity system which results in a homogeneous, ultrapure streptavidin with very low nonspecific binding characteristics.

Unconjugated streptavidin is recommended for use in solid-phase assays and immunohistochemical applications when the technique of sequential addition of reagents (sandwich technique) is employed. This reagent has also been effectively employed in subtractive hybridization procedures.


  • Resembles egg white avidin in its biotin binding properties
  • In most applications streptavidin and avidin are interchangeable


Unit Size1 mg
ApplicationsImmunohistochemistry / Immunocytochemistry, Immunofluorescence, ELISAs
Recommended UsageRecommended method of reconstitution: dissolve in 10 mM phosphate, 0.15 M NaCl, pH 7.5. Reconstituted solutions of streptavidin may be preserved with 0.08% sodium azide. The recommended concentration range for use is 5-20 µg/ml.
Recommended Storage2-8 °C


Applicable patents and legal notices are available at legal notices.

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