Fig 3. Maximum likelihood phylogenetic trees of 33F-1 cps genes (wciE-wcyO) with homologues from all other serotypes.

As all genes except wcyO were identical in all 33F-1 isolates only one sequence is included as a representative. Un-collapsed trees are provided in S5 Fig. DNA sequences were aligned using MUSCLE and trees were constructed using the Tamura-Nei model in MEGA 7. Only bootstrap values above 50% are shown.