Soluble peroxidase in pericarp of litchi (Litchi chinensis sonn. Cv. Heiye) fruit was extracted by phosphate buffer and purified by ammonium sulfate precipitation, ion exchange chromatography using DEAE Sephadex A-50 column, and gel filtration using Sephadex G-100 column. The specific activity of the purified enzyme increased 65.70 fold over the crude extract with 45.66% recovery. The effects of pH and temperature on activity of peroxidase(POD) were assayed. The Km for H2O2 and 4-methylcatechol were determined by Lineweaver-Burk plots. Several compounds including phonelic compounds were used as the substrates of the enzyme for specificity study. The effects of various inhibitors on this peroxidsae were also assayed.
GONG Qin-Qin, TIAN Shi-Ping. Partial Characterization of Soluble Peroxidase in Pericarp of Litchi Fruit[J]. Progress in Biochemistry and Biophysics,2002,29(6):891-896
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