Streptavidin is a tetrameric protein with a globular structure. It is isolated from the bacterium Streptomyces avidinii. Streptavidin is highly thermostable and is resistant to extreme pH, organic solvents, denaturants, detergents, and enzymatic degradation.
Streptavidin has been used to saturate supported lipid bilayers (SLBs) during its preparation.
Streptavidin is widely used as a linker in biotechnology as it forms a very stable bond under well-preserved biological conditions. It exhibits a high binding affinity for biotin. This feature of streptavidin makes it a very efficient and versatile tool for the development of novel sensors. Streptavidin-biotin system is also used in various chemical and biological applications such as detection, labeling, and drug delivery.
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