List of the 37 cultivated P. asymbioticus strains and the four Polynucleobacter sp. strains, including accession numbers (Table S1); characterization of the nine habitats of origin of the P. asymbioticus strains and the habitat of origin of one Polynucleobacter sp. strain (Table S2); sequencing statistics for eight P. asymbioticus genomes (Table S3); statistics after assembly with Velvet (Table S4); characterization of eight selected GI variants (Table S5); presence/absence patterns for six genes contained in CSC and peptidoglycan/LPS O-acetylase sequence types (Table S6); best blast hit analysis of four groups of genes (Fig. S1); GC% distributions of the genes in the four groups (Fig. S2); COG distributions of the genes in the four groups (Fig. S3); clustering of flexible GI and non-GI genes (Fig. S4)
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