Description Peroxidase is isolated from the horseradish root by our company's specialized method. The peroxidase fractions that have high RZ values (ca 3.3) are combined to prepare the HRP product (EIA Grade). This preparation has an RZ value higher than 3 and is electrophoretically homogeneous. Composition Reddish-brown amorphous powder, lyphilized. Application This highly purified preparation of horseradish peroxidase is useful as a protein tracer in histochemistry and cytochemistry, as well as a valuable experimental tool in hodological neurography. Furthermore, the enzyme preparation has been used as a label in enzyme immunoassays. Storage Product must be stored as dry powder only. Store at or below -20°C. Product cannot be stored in liquid form. Product is stable at 2-8°C for one month.