title: Interaction between gliadins and anthocyan derivatives.
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.
authors.affiliation: Department of Business Science - Area Technology and Resource Valorization, Alma Mater Studiorum - University of Bologna, Piazza Scaravilli 2, 40126 Bologna, Italy. Electronic address: palmira.mazzaracchio@unibo.it.
authors.forename: Palmira
authors.initials: P
authors.lastname: Mazzaracchio
authors.affiliation: Department of Business Science - Area Technology and Resource Valorization, Alma Mater Studiorum - University of Bologna, Piazza Scaravilli 2, 40126 Bologna, Italy.
authors.forename: Silvia
authors.initials: S
authors.lastname: Tozzi
authors.affiliation: Department of Organic Chemistry 'A. Mangini', Alma Mater Studiorum - University of Bologna, Viale del Risorgimento, 4, 40136 Bologna, Italy.
authors.forename: Carla
authors.initials: C
authors.lastname: Boga
authors.affiliation: Department of Organic Chemistry 'A. Mangini', Alma Mater Studiorum - University of Bologna, Viale del Risorgimento, 4, 40136 Bologna, Italy.
authors.forename: Luciano
authors.initials: L
authors.lastname: Forlani
authors.affiliation: ID Tech S.r.l, Via Protti 9, 40139 Bologna, Italy.
authors.forename: Pier Giorgio
authors.initials: PG
authors.lastname: Pifferi
authors.affiliation: Department of Business Science - Area Technology and Resource Valorization, Alma Mater Studiorum - University of Bologna, Piazza Scaravilli 2, 40126 Bologna, Italy.
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Barbiroli
keywords: Anthocyanins; Gliadins; Interaction; Spectroscopy