Streptavidin (HRP)

May be stored at 4 °C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 °C. Aliquots are stable for 6 months at -20 °C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer. Labeled with horseradish peroxidase (HRP). Sodium azide is a potent inhibitor of peroxidase and should not be added to HRP conjugates. HRP conjugates are sensitive to light.<br>

Assay by immunoelectrophoresis resulted in a single precipitin arc against anti-peroxidase and anti-streptavidin. No reaction was observed against anti-avidin.