Hypochromic effect of an aqueous monoglucosyl rutin solution caused by green tea catechins.
Eight catechins reduced the color of a monoglucosyl rutin solution, the gallate-type catechins having a greater effect than the non-gallate-type catechins. Each catechin formed a 1:1 complex with monoglucosyl rutin. The binding constants of the gallate-type catechins were larger than those of the non-gallate type. These results indicate that the degree of color change in the monoglucosyl rutin solution depended on the ability of each catechin to form a complex with monoglucosyl rutin.
Ujihara
Tomomi
T
National Institute of Vegetable and Tea Science, National Agriculture and Food Research Organization, Shimada, Shizuoka, Japan. ujiharat@affrc.go.jp
Hayashi
Nobuyuki
N
D000042:Absorption; D028241:Camellia sinensis / Q000737:chemistry*; D002392:Catechin / Q000378:metabolism*; D003116:Color; D012431:Rutin / Q000737:chemistry*; D012996:Solutions; D013662:Tea / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D012996:Solutions; D013662:Tea; D014867:Water; D012431:Rutin; D002392:Catechin