Figure 1.

Phylogenetic tree based on comparison of major eubacterial dnaK and organellar HSP70. The outgroup is represented by two eukaryotic sequences of HSP70 from Saccharomyces cerevisiae, an endoplasmic reticulum resident form (KAR1) and a cytosolic resident form (SSA1). The tree was constructed using the maximum likelihood method using the Jones–Taylor–Thornton model of amino acid substitutions (lnL = −16059.6). The reliability of nodes is given as bootstrap values, shown below the considered nodes. For the three nodes of main interest, the bootstrap proportions computed by the three different tree reconstruction methods are given in boxes.