Results 1 to 10 of about 30,863 (143)

Olive Polyphenol Oxidase Gene Family. [PDF]

Int J Mol Sci, 2023
The phenolic compounds containing hydroxytyrosol are the minor components of virgin olive oil (VOO) with the greatest impact on its functional properties and health benefits. Olive breeding for improving the phenolic composition of VOO is strongly dependent on the identification of the key genes determining the biosynthesis of these compounds in the ...
Sánchez R, Arroyo L, Luaces P, Sanz C, Pérez AG.   +4 more
europepmc   +4 more sources

An In Vitro Catalysis of Tea Polyphenols by Polyphenol Oxidase. [PDF]

Molecules, 2023
Tea polyphenol (TPs) oxidation caused by polyphenol oxidase (PPO) in manufacturing is responsible for the sensory characteristics and health function of fermented tea, therefore, this subject is rich in scientific and commercial interests. In this work, an in vitro catalysis of TPs in liquid nitrogen grinding of sun-dried green tea leaves by PPO was ...
Liu K, Chen Q, Luo H, Li R, Chen L, Jiang B, Liang Z, Wang T, Ma Y, Zhao M.   +9 more
europepmc   +4 more sources

Forage Polyphenol Oxidase and Ruminant Livestock Nutrition [PDF]

Frontiers in Plant Science, 2014
Polyphenol oxidase (PPO) is associated with the detrimental effect of browning fruit and vegetables, however interest within PPO containing forage crops has grown since the brownng reaction was associated with reduced nitrogen (N) losses in silo and the
Michael Richard F. Lee
doaj   +4 more sources

Purification and Enzymatic Properties of Soluble and Membrane-Bound Polyphenol Oxidase from Agaricus bisporus [PDF]

Shipin Kexue, 2023
An extraction and purification method for soluble polyphenol oxidase (sPPO) and membrane-bound polyphenol oxidases (mPPO) from Agaricus bisporus was developed involving temperature-induced phase partitioning, fractional precipitation with ammonium ...
HE Xingxing, LEI Jing, GUAN Wenqiang
doaj   +1 more source

Antioxidant enzymes in the needles of different omorika lines [PDF]

Archives of Biological Sciences, 2005
Picea omorika (Panč) Purkyně (Serbian spruce) is a Balkan endemic coniferous species. We studied soluble peroxidase, catalase, polyphenol oxidase, and superoxide-dismutase activity in the needles of five omorika lines grown in a generative seed orchard ...
Bogdanović Jelena, Dučić Tanja M., Milosavić Nenad B., Vujčić Z., Šijačić Mirjana, Isajev Vasilije, Radotić Ksenija   +6 more
doaj   +1 more source

Study on the Synthesis of Theaflavin-3,3′-Digallate Catalyzed by Escherichia coli Expressing Tea Tree Polyphenol Oxidase Isozymes and Its Enzymatic Solution

Fermentation, 2023
Polyphenol oxidase and its isoenzymes are crucial enzymes in the tea tree that catalyze the synthesis of theaflavins. In this study, tea tree polyphenol oxidase was used as the research object, and various protein sequence treatments, such as TrxA fusion
Changwei Liu, Jinghui Zhou, Jianan Huang, Wei Xu, Zhonghua Liu   +4 more
doaj   +1 more source

Polyphenol oxidases exhibit promiscuous proteolytic activity [PDF]

Communications Chemistry, 2020
AbstractTyrosinases catalyse both the cresolase and catecholase reactions for the formation of reactive compounds which are very important for industrial applications. In this study, we describe a proteolytic activity of tyrosinases. Two different tyrosinases originating from mushroom and apple are able to cleave the carboxylesterase EstA. The cleavage
Biundo, A., Braunschmid, V., Pretzler, M., Kampatsikas, I., Darnhofer, B., Birner-Gruenberger, R., Rompel, A., Ribitsch, D., Guebitz, G. M.   +8 more
openaire   +6 more sources

Screening of Producing Polyphenol Oxidase Strains from the Fermentation Process of Liupao Tea and Purification of Polyphenol Oxidase

Shipin gongye ke-ji, 2022
In this study, 42 strains of microorganisms were isolated by traditional culture methods from the fermentation process of Liupao tea. The agar plate screening and liquid culture second round of screening was used to select microorganisms from 42 strains ...
Jie WANG, Yulin HE, Jianwen TENG, Ning XIA, Baoyao WEI, Li HUANG   +5 more
doaj   +1 more source

MEKANISME INHIBISI ENZIM POLIFENOL OKSIDASE PADA SARI BUAH MARKISA DENGAN SISTEIN DAN ASAM ASKORBAT1

Jurnal Riset Kimia, 2015
The mechanism of polyphenol oxidase enzyme inhibition was studied by isolation of enzyme from the passion fruite juice (Passiflora Sp). The extracted enzyme polyphenol oxidase has an optimum activity at pH 5,6 and temperature of 300 C using a pirogalol ...
Elida Mardiah
doaj   +1 more source

Characterization of Polyphenol Oxidase from Eruca sativa

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2023
Enzymatic browning reactions by polyphenol oxidases cause alteration of appearance, flavor and nutritive value of vegetables and fruits. It is one of the important problems for vegetables used as salads and causes lots of economic losses. In this study,
Sibel Kahraman, Negin Shabnam
doaj   +1 more source