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. 2013 Dec 14;3(1):4–10. doi: 10.1016/j.imr.2013.12.002

Table 3.

Structure–function relationships of green tea catechins

Functions Structures Refs
SGLT1 block G ring
GLUTs block G ring
Alcohol absorption block G ring



In KATP channels
PIP sensitivity block G ring + P ring
ATP sensitivity block G ring + P ring
Direct channel block G ring + C ring > G ring + P ring



ROS generation G ring + P ring > G ring + C ring
ROS scavenging G ring, C ring, P ring, and R ring 12
Antifungal action P ring 36

ATP, adenosine triphosphate; C ring, catechol ring; G ring, gallate ring; GLUTs, glucose transporters; KATP, ATP-sensitive K+; P ring, pyrogallol ring; PIPs, phosphatidylinositol polyphosphates; R ring, resorcinol ring; ROS, reactive oxygen species; SGLT1, sodium-dependent glucose transporter 1.