Fig. 2From: Identification and characterization of the Populus trichocarpa CLE familyThe PtCLE proteins are classified into four major groups. a Phylogenetic analysis of PtCLE proteins. The tree was generated from the alignment of the CLE motifs of all PtCLE protein sequences with 1000 bootstrap replicates. The distinct groups are shown by colored branches. b Weblogo representation for the CLE motifs for each of the four groupsBack to article page