Fig. 3From: Poplar protease inhibitor expression differs in an herbivore specific mannerPhylogenetic tree of poplar KTI proteins. PnKTIs identified in this study are shown in blue and asterisks mark full-length cDNA sequences. The tree was inferred using the Neighbor-Joining method and the JTT matrix-based method. Bootstrap values (n = 500) are shown next to each node. The tree is drawn to scale, with branch lengths in the units of the number of amino acid substitutions per siteBack to article page