Fig. 4

Venn diagrams representing numbers of orthologous and unique TCS genes between and among the four Azospirillum strains studied. a Numbers of orthologous total TCS genes; b Numbers of orthologous genes encoding HyHKs. The number of orthologous TCS genes was determined by reciprocal best blast hit (amino acid identity percentage greater than 35 % and query coverage greater than 75 %). The total number of TCS coding genes within each genome is listed in brackets next to the strain name. * Among HyHKs common to both A. brasilense strains, 21 were classified as HyHKs in A. brasilense Sp245 and 22 in A. brasilense CBG497