Protein A Peroxidase is a useful reagent in Western Blotting and ELISA experiments. Protein A Peroxidase can be utilized as a pseudo-secondary detection reagent when used in conjunction with an IgG-based primary antibody and appropriate substrate (such as TMB-1000 or Femtomax-110). Protein A Peroxidase is stable at 4° C until restored, at which point it is recommended to freeze aliquots at -20° C.