Abstract
The interaction of gliadins with some anthocyanins (e.g. myrtillin, malvin, keracyanin, callistephin) and anthocyanidins (e.g. delphinidin, pelargonidin, cyanidin) has been analysed in aqueous solution at pH condition of the stomach, in which these compounds are initially metabolized.NMR, FT-IR and UV–Vis spectroscopic methods have been employed to determine the anthocyanin binding mode.The spectroscopic data seem to indicate that anthocyans are located along the polypeptide chains of gliadins in a generical molecular interaction between the two moieties. Our data do not exclude that hydrogen bonding interaction too is operating.Anthocyan–gliadins complexes are very soluble in acidic conditions.The results provide new insights into anthocyan–protein interaction and may have relevance to human health.
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