Figure 8From: Genome-wide transcriptome analysis of the transition from primary to secondary stem development in Populus trichocarpaClustering and identities of expansin (A) and extensin (B) gene families based on gene expression. Hierarchical clustering of expressed (A) expansin gene family (EXPA, EXPB, EXLA, EXPLB) and (B) extensin gene family. Gene names/closest Arabidopsis hit information in Additional file 9.Back to article page