Whole-cell protein extracts were prepared from strains SA33T and 7A078 and the type strains of several related
species and analysed by SDS-PAGE, as described previously (Pot et al., 1994), and the results are shown in
Supplementary Fig. S2. The newly isolated strains showed protein profiles that were clearly different from those of
type strains of related Burkholderia species. Since it is well known that bacteria with identical or very similar protein
patterns possess high genome similarity (Vandamme et al.,1996), these SDS-PAGE results support the notion that
strains SA33T and 7A078 represent a novel aluminiumtolerant Burkholderia species.