One of three specific glucosyltransferases in pea (Pisum sativum) thatsuccessively add a β-D-glucosyl group first to O-3 of kaempferol, and then to O-2 of the previously added glucosyl group giving the 3-O-sophoroside and then the 3-O-sophorotrioside (see also EC 220.127.116.11 flavonol 3-O-glucosyltransferase, and EC 18.104.22.168 flavonol-3-O-glucoside glucosyltransferase).
Jourdan, P.S. and Mansell, R.L. Isolation and partial characterization of three glucosyl transferases involved in the biosynthesis of flavonol triglucosides in Pisum sativum L. Arch. Biochem. Biophys.213 (1982) 434–443. [PMID: 6462109]