Reaction catalyzed by glucuronosyltransferase (2.4.1.17)
3
+
3
=
3
+
+
+
3 quercetin
+
3 UDP-glucuronate
=
3 UDP
+
quercetin 7-glucuronide
+
quercetin 3-glucuronide
+
quercetin 3'-glucuronide
