Description:Streptavidin is a tetrameric protein derived from the bacterium *Streptomyces avidinii*. It is known for its high affinity for biotin, a vitamin that plays a crucial role in various biological processes. The protein exhibits a molecular weight of approximately 60 kDa and is composed of four identical subunits, each capable of binding one molecule of biotin. Streptavidin is characterized by its stability across a range of pH levels and temperatures, making it suitable for various laboratory applications. Its strong biotin-binding capability is utilized in numerous biotechnological and diagnostic applications, including enzyme-linked immunosorbent assays (ELISA), Western blotting, and the purification of proteins. Additionally, streptavidin is often used in conjunction with biotinylated molecules to facilitate the detection and isolation of proteins, nucleic acids, and other biomolecules. Importantly, streptavidin is non-glycosylated, which reduces potential interference in assays, and it is generally considered to be less immunogenic than other similar proteins, such as avidin.
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