Fig. 5.

Vitamin synthesis and transport in Roseburia species. Rectangles represent biosynthetic pathways and circles represent transporters that were predicted by the species indicated. Each shape is coloured to represents a particular B vitamin that we predict can be synthesized or transported. The ThiT, RibU, PanT, PdxU2, BioY and FolT genes are energy coupling factor (ECF)–type transporters for thiamine, riboflavin, pantothenate, pyridoxine, biotin and folate, respectively, while BtuCDF is an ATP-binding cassette (ABC) transporter with a substrate-specific domain for cobalamin transport.