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Phylogenetic relationships among auxin/indole-3-acetic acid (Aux/IAA) family members. The Neighbor-Joining (NJ) tree contains 23 PpIAAs, 25 SlIAAs and 34 AtIAAs distributed across 3 major clades, with 4 sub-clades within group I. Bootstrap values were calculated from 1000 replications and are indicated at each node. PpIAAs are indicated with filled black circles.
