Fig. 3. Structure and sequence analysis of the GmSUB1 gene. (A) Schematic diagram of GmSUB1. Open boxes represent exon sequences. Shaded boxes represent repeated sequences in the promoter region. (B) Alignment of the deduced amino acid sequence of GmSUB1 with AIR3 of Arabidopsis. Identical residues are shaded in black. The predicted cleavage sites for the signal peptide (open triangle) and propeptide domain (shaded triangle) are indicated. Conserved residues forming the catalytic triad and substrate binding site are indicated with an asterisk (*). GenBank accession number AY277949.