Distribution of TonB-dependent transporters (TBDTs) found in genomes of cyanobacteria. Cyanobacterial sequences of TBDTs are highlighted and the containing frames are enlarged at the bottom. Dashed boxes indicate the dimensions shown in Figure 1. The colour code shows the different species as indicated in the right corner. The numbers are according to Table 1.
Mirus et al. BMC Biology 2009 7:68 doi:10.1186/1741-7007-7-68