Fig. 3: Analysis of the Serratia marcescens gene repertoire.

a Phylogenetic tree with branches coloured according to the number of gene gains and losses inferred by Panstripe. b Principal Coordinate Analysis (PCoA) of S. marcescens strains based on gene presence absence. Each dot corresponds to a S. marcescens strain coloured on the basis of its cluster. The shaded regions represent the three clusters identified by the K-means unsupervised algorithm.