Figure 2

Circular maps and genomic islands of the genomes of Chl. chlorochromatii (A) and “ Ca . S. mobilis” (B). From outside in, the circles represent open reading frames (ORFs) on the forward strand, ORFs on the reverse strand, BLASTP scores of ORFs against reference genomes, mol% G + C, and GC skew. Colors of ORFs represent COG (clusters of orthologous groups of proteins) categories. Mol% G + C is plotted using genome averages as baselines, which are 44.3% and 59.1% for the epibiont and the central bacterium, respectively. Genomic islands are marked by red boxes (see Materials and methods for identification of genomic islands). The reference genomes used in this study are: Chlorobaculum parvum NCIB 8327, Chlorobaculum tepidum ATCC 49652, Chlorobium ferrooxidans DSM 13031, Chlorobium limicola DSM 245, Chlorobium phaeobacteroides BS-1, Chlorobium phaeobacteroides DSM 266, Chlorobium phaeovibrioides DSM 265, Chlorobium clathratiforme DSM 5477, Chlorobium luteolum DSM 273, Prosthecochloris aestuarii DSM 271, and Chloroherpeton thalassium ATCC 35110 for Chl. chlorochromatii; Acidovorax avenae citrulli str. AAC00-1, Rhodoferax ferrireducens DSM 15236, Alicycliphilus denitrificans str. BC, Comamonas testosteroni str. CNB-2, Delftia acidovorans str. SPH-1, Polaromonas naphthalenivorans str. CJ2, Variovorax paradoxus str. EPS, and Verminephrobacter eiseniae str. EF01-2 for “Ca. S. mobilis.”