Figure 1

Gene content in, and downstream of, the nif gene region of Cyanothece sp. ATCC 51142 and spheroid body of R. gibba. Blue and red bars represent orfs coded on the leading or lagging strand of DNA, respectively. The locations of pseudogenes in the spheroid body fragment have been indicated with green bars. Genes have been named either according to homology matches in BLAST analyses or numbered consecutively for each organism (see also additional files 1 and 2). A GATA [29] plot is shown and indicates regions of high synteny between both organisms. GATaligner settings were: Window size: 100; Match: 5; MisMatch:-4; Gap Creation:-10; Gap Extension:-4; Raw Score Cut Off: 80. GATAPlotter score settings: Max: 141 bits, expect 1E-33; Min: 46.8 bits, expect 5E-5. GATAPlotter scores have been represented using a greyscale bar. Regions of the spheroid body genome showing modifications of special interest have been indicated. A) Gene inactivation by pseudogenisation (e.g. fdx N*); B) Gene deletion with DNA loss (e.g. cyl 0012); C) Gene deletion without DNA loss resulting in large non-coding regions (e.g. cyl 0016); D) Gene deletion with DNA loss resulting in gene fusion (e.g. cyl 0019). See text for further description of individual modifications.