Figure 6  Phylogeny of L. amylovorus Slp:s. A neighbour-joining phylogenetic tree based on L. amylovorus Slp sequences was generated by creating a multiple amino acid sequence alignment of the predicted S-layer proteins with MUSCLE [39], by eliminating poorly aligned positions using GBLOCKS [40], and by generating phylogenies using the PhyML package [41]. Numbers 1–3 indicate the presence of several slp genes in the same strain. *, the corresponding gene is expressed.