FIG 3.

Phylogenetic tree constructed using the maximum likelihood method showing relationship based on the 16S rRNA gene between the two newly isolated Zetaproteobacteria from Norsminde and Kalø Vig and representative microaerophilic Fe(II) oxidizers and anoxygenic phototrophic Fe(II) oxidizers. The scale bar corresponds to 0.1 nucleotide substitutions per site. At the branches, bootstrap values (from 1,000 replications) are indicated. Accession numbers are shown in parentheses next to the organism names.