Neighbor-joining distance tree of Arabidopsis UGTs and other plant glucosyltransferases (GT) belonging to the group D. The amino acid sequences were aligned using ClustalX (Thompson et al., 1997). The Arabidopsis Genome Initiative codes corresponding to Arabidopsis UGTs are given in Table II. The GenBank accession numbers of other plant GTs are: Allium cepa 73G1 and 73J1, AAP88406 and AAP88407, respectively (Kramer et al., 2003); Catharanthus roseus, BAD29722 (Kaminaga et al., 2004); Dorotheanthus bellidiformis, CAB56231 (Vogt et al., 1999); Gentiana triflora, BAC54092 (Fukuchi-Mizutani et al., 2003); Glycyrrhiza echinata, BAC78438 (Nagashima et al., 2004); tomato, CAA59450 (O'Donnell et al., 1998); Manihot esculenta, CAA54610 (Hughes and Hughes, 1994); Medicago truncatula, AAW56091 (Achnine et al., 2005); tobacco, TOGT1 and TOGT2, AAK28303 and AAK28304, respectively (Fraissinet-Tachet et al., 1998); Scutellaria baicalensis, BAA83484 (Hirotani et al., 2000); Solanum tuberosum, AAB48444 (Moehs et al., 1997); and Vigna angularis, BAB83692 (Xu et al., 2002).