Figure 4

Comparison of PBS rod gene regions of the different pigment types of marine Synechococcus. Rectangles above and below the lines have a length proportional to the size of ORFs and correspond to the forward and the reverse strand, respectively. In several genomes, the sense of the rod region was inversed so that the regions all appear in the same direction. For the group formed by the chromatic adapters and RCC307, a few variations can be found with regard to the region shown here, which corresponds to BL107. First, the lyase-encoding gene(s) located near the 3'-end can either be a rpcE-F operon or rpcG, a pecEF-like fusion gene (see text). Second, the gene organization at the 5'-end can vary: unk1 is located elsewhere in the genome of RCC307 and the gene following unk2 is either the lyase gene cpcT in RS9916 and RCC307, unk3 in BL107 and CC9902, or none of these in CC9311. Colored stars indicate the pigment type of each strain (see Figure 1 for color code).