The Arabidopsis xylosyltransferases, XXT3, XXT4, and XXT5, are essential to complete the fully xylosylated glucan backbone XXXG-type structure of xyloglucans.
Zhang N, Julian JD, Yap CE, Swaminathan S, Zabotina OA. New Phytol. 2023 Jun; 238(5):1986-1999. Epub 2023 Apr 6.