Fig. 5. Relationships amongst annelid HSP70 proteins. The tree was reconstructed by maximum likelihood methods [PHYML (Guindon et al., 2003)] under a JTT+invariant+gamma model (see Materials and methods). The accession number of the amino acid sequences is provided after each species name. The values indicated on the branches correspond to bootstrap percentages. According to the tree, the sequence Paralvinella grasslei form 1 is clearly related to the Alvinella pompejana sequence, while the Paralvinella grasslei form 2 sequence is unambiguously distinct from this group.