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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Vinylcatechin Dimers Are Much Better Copigments for Anthocyanins than Catechin Dimer Procyanidin B3
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Vinylcatechin Dimers Are Much Better Copigments for Anthocyanins than Catechin Dimer Procyanidin B3

机译:与儿茶素二聚体原花青素B3相比,乙烯基儿茶素二聚体对花色苷的复制效果更好。

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摘要

The binding constants (K) for the interaction of three copigments (CP), two epimeric vinylcatechin dimers (CP1 and CP2), and catechin dimer B3 (CP3) with two pigments, malvidin-3-glucoside (oenin) and malvidin-3,5-diglucoside (malvin), were determined. The K values clearly show that both vinylcatechin dimers have much higher affinity for oenin and malvin than dimer B3: K_(CP2) > K_(CP1) K_(CP3). Quantum mechanics and molecular dynamics calculations were also performed to interpret the binding data and specify the relative arrangement of the pigment and copigment molecules within the complexes.
机译:三个色素(CP),两个差向异构乙烯基儿茶素二聚体(CP1和CP2)和儿茶素二聚体B3(CP3)与两种色素malvidin-3-glucoside(oenin)和malvidin-3相互作用的结合常数(K),测定了5-二葡萄糖苷(麦尔文)。 K值清楚地表明,两个乙烯基儿茶素二聚体都比二聚体B3对卵磷脂和麦尔文具有更高的亲和力:K_(CP2)> K_(CP1) K_(CP3)。还进行了量子力学和分子动力学计算,以解释结合数据并指定了复合物中色素和色素分子的相对排列。

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