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. 2007 Jun 5;7:85. doi: 10.1186/1471-2148-7-85

Figure 4.

Figure 4

Unique synapomorphies highlighting the HGT of RubisCO from a Nitrococcus-like γ-proteobacterium to the common ancestor of the Paulinella chromatophore and free-living α-cyanobacteria. Selected regions of the RubisCO large subunit amino acid sequence were plotted against a simplified phylogram (NJ bootstrap consensus tree). Three synapomorphies shared by Nitrococcus and α-cyanobacteria are shown in red colour (positions 36, 59, 64); Histidine 399 and Serine 405 (blue) are unique for Paulinella and free-living α-cyanobacteria to the exclusion of all proteobacterial ancestors and β-cyanobacteria.