Fig. 1

Sequence alignment of LhSorTGA2 with proteins of the TGA family in Arabidopsis. Sequences were aligned using Clustal W. Identical residues are shaded in black, highly similar residues are shaded in dark gray, and similar residues are shaded in gray. The DNA binding domain (DBD) is indicated by a dashed line box. The conserved glutamine residues (black arrow), alanine residues (blue arrow) and serine residues (red arrow), are indicated by arrows. Three leucine residues and one glycine residue for the four heptad repeats in leucine zipper are highlighted by triangles. Two glutamine rich acid domains (QI and QII) that mediate transcription activation are highlighted by solid line boxes. The signature sequence for group D bZIP transcription factors, Yx₂RL[RQ]ALSS[LS]W, is underlined. The accession numbers of all the TGA proteins used for sequence alignment are listed in Additional file 2: Table S1