MeSH note : a Golgi-localized epimerase involved in the biosynthesis of L-arabinose;catalyzes
the 4-epimerization of UDP-D-Xyl to UDP-L-Ara, the nucleotide sugar used by glycosyltransferases
in the arabinosylation of cell wall polysaccharides and wall-resident proteoglycans;
has been sequenced;