Fig. 1.

Bayesian likelihood tree for EXPA family. Burnin was set to 60. The tree was rooted manually at groups A, B and C. Clade and groupings are marked with circles (or bars when they are poorly resolved as in the case of clades EXPA-I, EXPA-II and EXPA-III). Physcomitrella patens sequences are unshaded, rice sequences are shaded in black, arabidopsis sequences boxed, and a Populus sequence in grey text. Intron patterns (‘o’ indicates an intronless gene) are given next to each gene's name, and the typical EXPA intron pattern is indicated.