Table 1.

Number of XTH proteins contained in each group in the phylogenetic tree

Group	Early diverging group	Group I/II	Group IIIA	Group IIIB
AtXTH Number	4	22	2	5
BnXTH Number	8	49	7	16
BrXTH Number	5	35	4	8
BoXTH Number	2	33	4	8