title: [Biochemical processes at the stage of withering during black tea production].
abstract: We determined the molecular weight and some properties of multiple forms of phenol oxidase from tea leaves and four other perennial plants. It was shown that multiple high- and low-molecular forms of phenol oxidase differed in substrate specificity. Low-molecular forms of the enzyme mostly demonstrated hydroxylase activity, while high-molecular forms showed catechol oxidase activity. It was revealed that the withering stage of black tea production is accompanied by the formation of only high-molecular forms of phenol oxidase, which possess catechol oxidase activity crucial for the procurement of oxidative reactions and the quality of the product.
authors.forename: N T
authors.initials: NT
authors.lastname: Omiadze
authors.forename: N I
authors.initials: NI
authors.lastname: Mchedlishvili
authors.forename: Kh N
authors.initials: KhN
authors.lastname: Rodrigez-Lopes
authors.forename: M O
authors.initials: MO
authors.lastname: Abutidze
authors.forename: T A
authors.initials: TA
authors.lastname: Sadunishvili
authors.forename: N G
authors.initials: NG
authors.lastname: Pruidze
mesh_terms: D028241:Camellia sinensis / Q000737:chemistry*; D004156:Catechol Oxidase / Q000737:chemistry; D003890:Desiccation; D005524:Food Technology; D007527:Isoenzymes / Q000737:chemistry; D006899:Mixed Function Oxygenases / Q000737:chemistry; D008970:Molecular Weight; D014442:Monophenol Monooxygenase / Q000737:chemistry*; D010084:Oxidation-Reduction; D018515:Plant Leaves / Q000737:chemistry*; D010940:Plant Proteins / Q000737:chemistry*; D013379:Substrate Specificity; D013662:Tea / Q000737:chemistry*
chemical_list: D007527:Isoenzymes; D010940:Plant Proteins; D013662:Tea; D006899:Mixed Function Oxygenases; D004156:Catechol Oxidase; D014442:Monophenol Monooxygenase