Figure 1.

Bootstrapped neighbour-joining unrooted phylogenetic tree of GxGYxYP proteins. The tree was calculated using the GxGYxYP region alone as described in Methods with MEGA 5 [13]. Bootstrapping values are given to the left of the node in question and are on a scale of 0–1. For each sequence the accession, residue range of the GxGYxYP domain and species name are given. Loci for B. thetaiotaomicron sequences discussed in the text are also given and those sequences coloured blue (BT2193 whose structure is reported here) or red.