Fig. 1From: Genome-wide identification and molecular characterization of the AP2/ERF superfamily members in sand pear (Pyrus pyrifolia)Phylogenetic tree and classification of 234 AP2/ERF gene family members in the Pyrus pyrifolia genome. The amino acid sequences of the 234 PpERFs proteins were aligned using ClustalW method and phylogenetic tree was constructed based on bootstrap analysis of 1000 replicates using the Neighbor-Joining (NJ) methodBack to article page