Figure 3

Phylogenetic tree of TrpD sequences. archaeal and bacterial protein sequences were used to construct the unrooted tree. The last letter of the acronyms indicates the taxonomical position of the species. "E" marks Euryarchaeota, "C" Crenarchaeota, and "B" bacterial species. The three TrpD sequences of N. pharaonis are designated as _1E, _2E, and _3E. For colour code and abbreviations, see legend of Figure 1.