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Multiple alignment of the HpaG peptide region and the corresponding regions from XopA, the XopA derivatives, and Hpa1 from X. oryzae pv. oryzae. In the sequences of the HpaG homologs, the amino acid residues that differ from the HpaG peptide are indicated by shaded boxes. The Leu and Ile repeat motifs are indicated by bold rectangles. The relative HR activity of each protein and the minimum concentrations that elicit HR in tobacco leaves are shown in the column to the right.
