Table 2.

Solvent and acid formation by C. saccharobutylicum wild-type and mutant strains in batch culture without pH regulation

	Wild type	Ch1	Ch1 ΔptbΔbuk
[Acetone]final (mM)	35 ± 2	29.5 ± 1.5	22 ± 1
[Butanol]final (mM)	87 ± 4	81 ± 3	76.5 ± 1.5
[Ethanol]final (mM)	12.5 ± 1.5	10.5 ± 0.5	17.5 ± 0.5
[Acetate]final (mM)	10.5 ± 0.5	13 ± 1	16 ± 1
[Butyrate]final (mM)	13 ± 1	16 ± 1	4.5 ± 1.5
Butanol yield (g·g−1)	0.165 ± 0.005	0.155 ± 0.005	0.215 ± 0.005

Mean values and standard deviations from two independent experiments are given