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Streptavidin protein (E. coli)

Cat. No. M15060

All AbMole products are for research use only, cannot be used for human consumption.

Streptavidin protein (E. coli) Structure
Size Price Availability Quantity
5mg USD 395  USD395 In stock
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Quality Control & Documentation
Biological Activity

Expression system: E. coli
Purity: SDS-PAGE Analysis > 95%
Theoretical molecular weight: 13500 Da
Storage and stability: the powder can be stored for several weeks at 4 ° C. For long-term storage, please store it at -20 ° C.


Biological activity: >15 u/mg protein, 1 u is defined as the amount of 1 microgram of protein bound. Streptavidin can bind to four moles of biotin per mole of protein and shows a very high affinity, about 10000-15000 da. Streptavidin lacks the carbohydrate side chain on the avidin, and its isoelectric point is 6.5 to 10, which is far closer to the point where the most useful biological interaction occurs. Therefore, streptavidin usually exhibits much lower nonspecific binding than avidin.

Chemical Information
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
References

[1] Kohki Kido, et al. Elife. AirID, a novel proximity biotinylation enzyme, for analysis of protein-protein interactions

[2] Joleen S Cheah, et al. Biochem Biophys Res Commun. A simple elution strategy for biotinylated proteins bound to streptavidin conjugated beads using excess biotin and heat

[3] Michael Fairhead, et al. Methods Mol Biol. Site-specific biotinylation of purified proteins using BirA

[4] Yifeng Li, et al. Protein Expr Purif. Expression and purification of E. coli BirA biotin ligase for in vitro biotinylation

[5] Thomas G M Schmidt, et al. Nat Protoc. The Strep-tag system for one-step purification and high-affinity detection or capturing of proteins

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Keywords: Streptavidin protein (E. coli) supplier, Cytokines and Growth Factors, inhibitors, activators

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