Fig. 8From: Identification of two different chemosensory pathways in representatives of the genus HalomonasSchematic representation of the phylum Proteobacteria. Black lines indicate the sequence of appearance of Proteobacteria classes as described by Gupta et al. [56]: δ and ε-Proteobacteria (eight orders, light blue), α-Proteobacteria (ten orders, light pink), β-Proteobacteria (eight orders, light green) and γ-Proteobacteria (nineteen orders, light yellow). Within each class, orders that contain species that carry cluster 2-like sequences are written in color (color-code as in Fig. 9). Asterisks indicate orders where we identified gene clusters that resemble cluster 2 with some alteration in gene order/composition (see text)Back to article page