Fig. 7From: Novel properties of photofermentative biohydrogen production by purple bacteria Rhodobacter sphaeroides: effects of protonophores and inhibitors of responsible enzymesProposed pathways involved in H2-metabolism in Rh. sphaeroides in nitrogen-limited (a) and nitrogen-excess (b) conditions. LHC light harvesting complex, RC reaction center, Q ubiquinone, Fd ferredoxin, Cyt cytochrome, Δp proton motive force, P i inorganic phosphate. See the textBack to article page