Hybridization (right) of the subclone pU799‐3 containing avrGf1 with total genomic DNA of Xanthomonas strains digested with HindIII and plasmid DNA (left). Lane 1, Xac‐Aw 12879; lane 2, Xac‐AwΩ; lane 3, Xac‐A 40; lane 4, Xac‐A 306; lane 5, Xac‐A* 1974; lane 6, Xac‐A* 1975; lane 7, Xaa‐B; lane 8, Xaa‐C; lane 9, Xac‐E 1887; lane 10, Xcc 8004; lane 11, Xac‐Aw 12879; lane 12, plasmid Xac‐Aw; lane 13, plasmid Xac‐A 40; lane 14, λ marker digested with EcoRI and HindIII.