Comparison of the hop gene complements of the three previously fully sequenced P. syringae genomes. Those hop genes that are conserved in Pta 11528 are shown in boldface and underlined. Pta 11528 also contains three hop genes that do not have orthologues in the sequenced genomes: hopAR1, hopF1 and hopW1. * No close homologue of avrPto1 was found in Pta 11528; however, there is a gene encoding a protein that shares 43% amino acid identity with Avr Pto 1 from Pto DC3000. ** In the Pta 11528 genome hrpZ1 appears to be a pseudogene.