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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Grape reaction product ： ウィキペディア英語版 Grape reaction product The grape reaction product (GRP, GRP1 or 2-S-glutathionyl caftaric acid) is a phenolic compound explaining the disappearance of caftaric acid from grape must during processing.〔Caftaric acid in grapes and conversion to a reaction product during processing. V.L. Singleton, J. Zaya, E. Trousdale and M. Salgues, Vitis, 1984, pages 113-120 ((article ))〕 It is also found in aged red wines. Its enzymatic production by polyphenol oxidase is important in limiting the browning of musts, especially in white wine production. The product can be recreated in model solutions. It is possible to determine its concentration in wine by mass spectrometry.〔Straightforward Method To Quantify GSH, GSSG, GRP, and Hydroxycinnamic Acids in Wines by UPLC-MRM-MS. Anna Vallverdú-Queralt, Arnaud Verbaere, Emmanuelle Meudec, Veronique Cheynier and Nicolas Sommerer, J. Agric. Food Chem. 2015, 63, 142−149, 〕 S-Glutathionyl caftaric acid is itself oxidizable.〔Caftaric Acid Disappearance and Conversion to Products of Enzymic Oxidation in Grape Must and Wine. V. L. Singleton, M. Salgues, J. Zaya and E. Trousdale, Am. J. Enol. Vitic, 1985, volume 36, number 1, pages 50-56 '(abstract ))〕 It is not a substrate for grape polyphenol oxidase, but laccase from ''Botrytis cinerea'' can use it to form GRP2. == Related molecules == Other related molecules are ''trans''-caffeoyltartrate derivatives like GRP o-quinone and 2,5-di-S-glutathionyl cafteoyl tartrate (GRP2) or adducts with anthocyanidins. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grape reaction product」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.