Fig. 6
From: Purification and characterization of cationic peroxidase from ginger (Zingiber officinale)
pH optimum of ginger GPII. The reaction mixture contained in 1.0 ml: 8 mM H2O2, 40 mM guaiacol, a suitable amount of enzyme, and 20 mM sodium citrate buffer (pH 4.0–4.5), sodium acetate buffer (pH 4.5–6.0), sodium phosphate buffer (pH 6.5–8.0), and Tris–HCl buffer (pH 8.0–9.0). The points are presented as mean ± S.E. (n = 3)