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Characterisation of polyphenol oxidase and peroxidase and the role in browning of loquat fruit
Eriobotrya japonica PPO POD
2015/3/30
Polyphenol oxidase (PPO) and peroxidase (POD) were extracted from a new loquat fruit cultivar (Ninghaibai) and characterised using reliable spectrophotometric methods. In both cases, the optimum pH fo...
Characterisation of polyphenol oxidase from Melissa officinalis L. subsp. officinalis (lemon balm)
lemon balm protein enzyme kinetics inhibition
2013/2/24
Polyphenol oxidase (PPO) from Melissa officinalis L. subsp. officinalis (lemon balm) was partially purified by ammonium sulphate precipitation and dialysis; and then it was characterised in detail in ...
Influence of Developmental Stage on Activities of Polyphenol Oxidase, Internal Characteristics and Colour of Lettuce cv. Grand Rapids
Developmental Stage Polyphenol Oxidase
2011/5/31
An analyzing study to evaluate the relationship between Polyphenol Oxidase (PPO) activity, internal qualities and degree of browning was conducted on lettuce var. Grand Rapids in order to understand t...
Variation of Total Polyphenol and Polyphenol Oxidase Activity during Maturation of Mango Fruit (Mangifera indica L. ‘Irwin’) Cultured in a Plastic House
‘Irwin’ mango fruit maturation of mango variation of total polyphenol
2009/7/8
Variation of total polyphenol (TPP) and polyphenol oxidase activity (PPO) was investigated in ‘Irwin’ mango fruit in various color stages of development: green, purple, purplish red and red. Fruits us...
Effects of Polyphenol Oxidase Activity in Wheat Flour on Protein-Bound 5-S-Cysteinyldopa Formation in Gluten
5-S-cysteinyl-3 4-dihydroxyphenylalanine (5-S-cysteinyldopa) polyphenol oxidase
2009/7/8
The effects of polyphenol oxidase (PPO) activity in wheat flour on the formation of protein-bound 5-S-cysteinyl-3, 4-di-hydroxyphenylalanine (5-S-cysteinyldopa) in gluten have been studied. The wheat ...
Comparison of Soluble and Plastidal Polyphenol Oxidase in Mature Apples
polyphenol oxidase plastid subcellular localization
2009/6/17
Polyphenol oxidase (PPO) is transported to plastid after translation. However, we often detect PPO activity in a soluble fraction of apple. Here we examined the location of PPO in retail apples. PPO a...
Purification and Characterization of Wheat（Triticum aestivum）Polyphenol Oxidase
wheat polyphenol oxidase purification
2009/6/10
Polyphenol oxidase was purified to homogeneity from Japanese wheat (Triticum aestivum cv. Tohoku 198) bran, using 4-methylcatechol as a substrate. The enzyme was purified 1670-fold with a recovery of ...
Banana Polyphenol Oxidase: Occurrence and Change of Polyphenol Oxidase Activity in Some Banana Cultivars during Fruit Development
polyphenol oxidase tyrosynase development period
2009/5/31
Occurrence of polyphenol oxidase (PPO, o-diphenol: oxygen oxidoreductase, EC.1.10.3.1) in the fruits of nine cultivars of banana (Musa spp.) commercially cultivated in China was investigated. All bana...
Purification and Characterization of Polyphenol Oxidase from Edible Yam（Dioscorea opposita Thunb.）
polyphenol oxidase edible yam dopamine oxidase
2009/5/31
Soluble polyphenol oxidase of edible yam (Dioscorea opposita Thunb.) was purified approximately 203-fold with a recovery rate of 15% by ammonium sulfate fractionation, ion exchange chromatography, hyd...
Rhyzopus oryzae Endopolygalacturonase and Borago officinalis Polyphenol Oxidase Thermostability, Isothermal and Thermal Gradient Methods
Borago officinalis polyphenol oxidase endopolygalacturonase heat inactivation
2008/10/26
Heat stability of two major enzymes in vegetable processing, such as endopolygalacturonase from Rhyzopus oryzae and polyphenoloxidase from Borago officinalis, has been calculated. Isothermal and nonis...
Rhyzopus oryzae Endopolygalacturonase and Borago officinalis Polyphenol Oxidase Thermostability, Isothermal and Thermal Gradient Methods
oryzae Endopolygalacturonase Borago officinalis Polyphenol Oxidase
2006/5/27
Heat stability of two major enzymes in vegetable processing, such as endopolygalacturonase from Rhyzopus oryzae and polyphenoloxidase from Borago officinalis, has been calculated. Isothermal and nonis...
Difference Spectrophotometric Measurement of Catecholamine Oxidative Activity of Edible Yam (Dioscorea) Polyphenol Oxidase
edible yam (Dioscorea) enzymatic browning dopamine
1995/5/19
Polyphenol oxidase was partially purified from aerial tubers of edible yam (Dioscorea opposita THUNB.). The enzyme strongly oxidized catecholamines such as dopamine and DL-noradrenaline. The optimum p...