Fig. 2

Phylogenetic relationships and motif distribution analysis. a Phylogenetic relationships between Arabidopsis and papaya IAA families. The unrooted tree was generated using the MEGA5.1 program by the neighbor-joining method. Bootstrap support from 1,000 replicates are shown at each branch. b The motif distribution in Arabidopsis and papaya IAA proteins. Motifs of Aux/IAA proteins were analyzed using the MEME web server. Four motifs, representing the domains I, II, III and IV, are mapped on all of the Aux/IAA proteins in different colors. c The height of each box represents the specific amino acid conservation in each motif