FIG. 3.

Schematic comparison of photosynthetic operons of Rhodobacter sphaeroides, eBAC60D04, eBAC25D05, and Rhodovulum sulfidophilum. Open reading frame (orf) abbreviations use nomenclature defined previously (references 10 and 13). Predicted open reading frames are in shaded according to biological category: bch, bacteriochlorophyll biosynthesis genes; crt, carotenoid biosynthesis genes; puf, light-harvesting and reaction center genes. White boxes indicate nonphotosynthetic and hypothetical proteins with no known function. Homologous regions are connected by gray areas.