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. 2021 Mar 18;12:645219. doi: 10.3389/fpls.2021.645219

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Copyright © 2021 Petersen, MacAlister and Ulvskov.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Glycosyltransferases involved in serine galactosylation and in Hyp arabinosylation, named after their mutant phenotype in Arabidopsis or screen in which the GT was identified (AtXEG113). AtSGT and AtExAD are specific to extensins, while the β-ArafTs have a wide selection of substrates. SGT, serine galactosyltransferase; HPAT1-3, hydroxyproline arbinosyltransferase 1-3; RRA1-3, reduced residual arabinose 1-3; XEG113, xyloglucan endoglucanase 113; ExAD, extensin deficient arabinose. The ortholog to AtXEG113 in tomato is the fasciated and branched 2, fab2, mutant (Xu et al., 2015).