The relationship of the groups of A. thaliana UGTs with other published plant UGTs. A simplified version of the A. thaliana UGT phylogenetic tree is shown with other plant UGTs added. The bootstrap values, which give the degree of confidence in the branching pattern presented, are 60-90% unless otherwise stated. The published substrate specificities for UGTs other than A. thaliana are listed to the right of the figure. Full species names referred to in the figure are as follows: Brassica napus, Citrus unshiu, Nicotiana tabacum, Perilla frutescens, Zea mays, Sorghum bicolor, Gentiana triflora, Perilla hybrida, Vitis vinifera, Phaseolus lanatus, Phaseolus vulgaris, Dorotheanthus bellidiformis, Solanum tuberosum.