We do not recommend storing Poly-HRP Streptavidin at -80 degrees C, as the product can freeze solid at temperatures below -25 degrees C even if it has 50% glycerol as a stabilizer, thereby necessitating thawing of the product. With multiple freeze-thaws, the enzyme conjugates are rendered unstable.
Find additional tips, troubleshooting help, and resources within our Protein Electrophoresis and Western Blotting Support Center