کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1223394 | 967889 | 2010 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Interactions of tea tannins and condensed tannins with proteins Interactions of tea tannins and condensed tannins with proteins](/preview/png/1223394.png)
Binding parameters for the interactions of four types of tannins: tea catechins, grape seed proanthocyanidins, mimosa 5-deoxy proanthocyanidins, and sorghum procyanidins (mDP = 17), with gelatin and bovine serum albumin (BSA) have been determined from isothermal titration calorimetry data. Equilibrium binding constants determined for the interaction with gelatin were in the range 104 to 106 M−1 and in the order: sorghum procyanidins > grape seed proanthocyanidins > mimosa 5-deoxy proanthocyanidins > tea catechins. Interaction with BSA was generally weaker, with equilibrium binding constants of ≤103 M−1 for grape seed proanthocyanidins, mimosa 5-deoxy proanthocyanidins and tea catechins, and 104 M−1 for the sorghum procyanidins. In all cases the interactions with proteins were exothermic and involved multiple binding sites on the protein. The data are discussed in relation to the structures and the known nutritional effects of the condensed tannins.
Journal: Journal of Pharmaceutical and Biomedical Analysis - Volume 51, Issue 2, 20 January 2010, Pages 490–495