Role of Chlorogenic Acid Quinone and Interaction of Chlorogenic Acid Quinone and Catechins in the Enzymatic Browning of Apple
Author(s) -
Kanako AMAKI,
Eri Saito,
Kumiko TANIGUCHI,
Keiko JOSHITA,
Masatsune Murata
Publication year - 2011
Publication title -
bioscience biotechnology and biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.509
H-Index - 116
eISSN - 1347-6947
pISSN - 0916-8451
DOI - 10.1271/bbb.100444
Subject(s) - chlorogenic acid , browning , polyphenol oxidase , chemistry , quinone , polyphenol , catechol oxidase , enzyme , substrate (aquarium) , biochemistry , tyrosinase , food science , antioxidant , biology , peroxidase , ecology
Chlorogenic acid (CQA) is one of the major polyphenols in apple and a good substrate for the polyphenol oxidase (PPO) in apple. Apple contains catechins as well as CQA, and the role of CQA quinone and its interaction with catechins in the enzymatic browning of apple were examined. Browning was repressed and 2-cysteinyl-CQA was formed when cysteine was added to apple juice. CQA quinone was essential for browning to occur. Although catechins and CQA were oxidized by PPO, some catechins seemed to be non-enzymatically oxidized by CQA quinone.
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