Fig. 5From: Quinones are growth factors for the human gut microbiotaModel for menaquinone-dependence in Faecalibacterium sp. Genome analysis suggests that Faecalibacterium sp. possess a truncated electron transport chain that is directed towards fumarate respiration. The required menaquinone is provided by an external source (indicated by the dashed arrow). MK menaquinone, MKH2 menaquinolBack to article page