FIGURE 5.

(A) Microbial fermentation pathway for propionate production which consumes H₂ via the randomizing (succinate) or non-randomizing (acrylate) pathways. Numbers refer to enzymatic conversion catalyzed by 1, transcarboxylase (pyruvate carboxylase, methylmalonyl-CoA decarboxylase or methylmaloynyl-CoA carboxytransferase); 2, malate dehydrogenase; 3, fumarase; 4, fumarate reductase; 5/9, propionyl-CoA transferase; 6, methylmalonyl-CoA mutase; 7, methylmalonyl-CoA epimerase; 8, lactate dehydrogenase; 10, lactoyl-CoA dehydratase; 11, acryloyl-CoA reductase. (B) Bar charts indicates metagenomic reads assigned to a given target gene per kb per genome equivalent for control (blue) and High BCM (red). Numbers on the x axis correspond to the same enzymatic steps as indicated in (A).