Fig. 6

Phylogenetic placements of deduced FTHFS amino acid sequences of the partial fhs sequences retrieved from D^TE37 and D^TE42. The fhs clone libraries were constructed of DNA samples collected on day 280, i.e. in period 3, from the TE-supplemented digesters. Reference acetogens are shown in bracket. The fhs sequences retrieved from D^TE37, D^TE42, or both, are coloured blue, red, or green, respectively. The terminal restriction fragment sizes are given in parentheses and the GenBank accession Nos. for representative sequences are specified at the end. The scale bar represents 20 % sequence divergence. Values at the nodes are the percentages of 1000 bootstrap replicates; values below 50 % are not shown