First of all, peroxidase fraction have to be extracted by following step. 0.5 g of plant tissue was put into a mortar and 4 ml of 50 mM Tris Maleate buffer pH 6.0 was added before grinding with pestle. Afterwards, the solution was transferred to centrifuge tube and kept immediately in triturated ice and centrifuged at 2oC and 1000 x g during 10 minutes. After that, the supernatant was collected and was stored in the freezer at -80oC (In this fraction would be measure the soluble peroxidase fraction activity). In addition, the precipitate material was kept for extraction of ionically peroxidase fraction and covalently peroxidase fraction as well.