Map-based cloning of RBPG1. A, Response to BcPG3 of Arabidopsis accessions Col-0 and Br-0 and Br-0 transgenic plants expressing P35S:RBPG1 (1.5 µm). Leaves were photographed 7 d after infiltration with BcPG3. B, Map of the RBPG1 locus. C, Phylogenetic tree of RBPG1 homologs in Col-0 and Br-0. The amino acid sequences were aligned by ClustalX 1.83, and the phylogenetic tree was generated by using MEGA4 by the neighbor-joining method with 1,000 bootstrap replicates.