Table 4.

Theoretical ranges of hydrogen yields for photoheterotrophic growth on different substrates and with different genetic modifications.

Substrate	ΔRubisco	ΔRubisco, +oxPPP/+oxTCA	max Y H2
Succinate	1.38	1.38 - 7	7 (1.75)
Malate	0.38	0.38 - 6	6 (1.5)
Propionate	1.38	1.38 - 7	7 (2.33)
Fructose	0.75	0.75 - 12	12 (2)
Acetate (Glyox)	0.51 - 4	0.51 - 4	4 (2)
Acetate (EMCoA)	0-4	0-4	4 (2)

ΔRubisco: RubisCO knockout, +oxPPP/+oxTCA: activated oxidative pentose phosphate pathway/activated oxidative TCA. Yields are given as mole hydrogen per mole substrate, yields in parentheses (last column) are given as mole hydrogen per mole carbon.