DescriptionStreptavidin is a tetrameric protein, with each subunit able to bind a single molecule of the vitamin biotin. Streptavidin-biotin bond is the strongest known non-covalent interaction with Kd ~10-15 M, and exhibits less nonspecific binding than avidin. Streptavidin is used extensively in molecular biology and bionanotechnology due to the streptavidin-biotin complex's resistance to organic solvents, denaturants, detergents, proteolytic enzymes, and extremes of temperature and pH.Molecular Weight (kDa)60 kDaFormulation10 mM phosphate buffered saline, pH 7.4Source Expressed in E coliSize1 mgStorage Temp & Conditions>6 months at –20°C. Avoid multiple freeze/thaw cycles.Application NotesUseful for the purification or detection of various biomolecules