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85878 Sigma

Streptavidin from Streptomyces avidinii

affinity purified, lyophilized from 10 mM potassium phosphate, ≥13 U/mg protein



Related Categories Antibodies, Biotin/Avidin, Molecular Biology, Plant Biotechnology, Plant Proteomics,
quality   affinity purified
  lyophilized from 10 mM potassium phosphate
mol wt   Mr ~60000
solubility   H2O: soluble1 mg/mL, clear to hazy, colorless to faintly yellow
storage temp.   −20°C


Analysis Note

Binding capability: Streptavidin binds one molecule of biotin per subunit. Comparison of biotin binding and absorbance measurements indicates that ≤5% binding sites are occupied.

Other Notes

Review: Application of the avidin-biotin technique in microbiology; Protein isolated from the bacterium Streptomyces avidinii, having a high affinity for biotin; Avidin-Biotin technology


5, 10 mg in glass bottle

Bottomless glass bottle. Contents are inside inserted fused cone.

The sales quantitites 1 mg and 5 mg correspond to ′mg protein′

Unit Definition

1 U corresponds to the amount of protein which binds 1μg (+)-biotin at pH 7.5

Price and Availability

Suggested Laboratory Gloves

Laboratory GlovesThis substance has been tested against several types of hand protection for CE compliance. Click below to find the recommended gloves for handling this product.

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Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy

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