Fig. 1.

The phylogenetic relationship of the unusual membrane anchor subunit SdhE to selected organisms. A similar enzyme complex is encoded by the Campylobacter jejuni genome. The W. succinogenes sdhE gene (locus tag WS1022; see Fig. 2A) is annotated as sdhC; it was renamed to sdhE in analogy to the Acidianus ambivalens homologue (Lemos et al., 2002). The gene product was named accordingly SdhE.