Figure 3.

Relative abundance levels of proteins involved in sulfate reduction in Syntrophobacter fumaroxidans. Abundance levels after shown after Z‐score normalization. The columns show in triplicates, the electron acceptor used by S. fumaroxidans to couple propionate oxidation, from left to right: fumarate, sulfate and interspecies compounds transferred to: Desulfovibrio desulfuricans, Methanobacterium formicicum and Methanospirillum hungatei. High relative expression is indicated in red and low relative expression is indicated in blue. Grey colour means not detected. The asterisk indicates a statistical significant difference in at least one condition.