Features: Avidin and streptavidin reagents are powerful tools to detect or purify biotinylated proteins, nucleic acids, and other macromolecules. Optimized for use in solid phase assays such as ELISAs and blotting applications. Horseradish Peroxidase Streptavidin (HRP Streptavidin) is produced by our own coupling procedure which preserves the high specific activity of the peroxidase. For horseradish peroxidase streptavidin (Sav-HRP) that is optimized for use in tissue/cell staining applications, see the following product: Streptavidin, Horseradish Peroxidase (Sav-HRP), Concentrate, for IHC/ICC.