A reverse phase HPLC and electrospray interface with ion trap mass spectrometer method was developed for the characterization of anthocyanins in Concord, Rubired, and Salvador grape juices. Rubired and Salvador grapes are hybrids from Vitis vinifera and Vitis rupestris. Concord grape is a grape from
Vitis vinifera has been thought to be unable to produce pelargonidin-type anthocyanins because its dihydroflavonol 4-reductase (DFR) does not efficiently reduce dihydrokaempferol. However, in this study, pelargonidin 3- O-glucoside was detected in the skins of V. vinifera 'Pinot Noir', 'Cabernet
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