Fig. 1

Phylogenetic relationship and alignment of basic and hinge regions of the SlbZIP proteins. a The phylogenetic tree is based on the sequence alignments of the SlbZIP proteins. Dendrogram constructed using Neighbor-Joining method by MEGA6.06. Bootstrap values from 1000 replicates are indicated at each node. Only bootstrap values larger than 50 % support are indicated. SlbZIP proteins are grouped into 9 distinct clades (A-I). b Alignment of basic and hinge regions of SlbZIP proteins. The first Leu of the Leu zipper was regarded as +1, and asparagine and arginine were numbered −18 and −10, respectively. Two already characterized plant bZIP proteins are shown on the top of each group for comparison. Amino acid residues K and I belonging to group IX and XI, respectively, are colored in blue as they differ from the usual R at −10 positions. SlbZIP gene names and protein names of already characterized SlbZIP proteins are also given on the left hand side