Fig. 1

Circular representation of the largest three replicons of the Rhizobium sp. AB2/73 genome. The inner ring shows GC skew, which is defined as (G-C)/(G + C), where G is the number of guanines and C the number of cytosines. The parts where guanines are overrepresented are pink and the parts where guanines are underrepresented are purple. The next ring shows GC content. The ring with thin green rectangles indicates the locations of IS elements. The outer ring shows predicted protein coding genes colored by the COG functional category they were placed in