Table 3 Acetaldehyde, higher alcohols and esters produced by NADPH-Bdh and NADH-Bdh strains in response to various levels of redox disturbance
Compound (mg/L) | NADPH-Bdh | NADH-Bdh | ||||||
|---|---|---|---|---|---|---|---|---|
Acetoin initial (mM) | 0 | 100 | 200 | 300 | 0 | 100 | 200 | 300 |
Acetoin consumed (mM) | 0 | 100 | 150 | 245 | 0 | 100 | 160 | 164 |
Acetaldehyde | 4.4 | 4.3 | 4.7 | 7.0 | 4.5 | 51.8 | 123.9 | 151.1 |
Ethyl hexanoate | 0.13 | 0.09 | 0.08 | 0.03 | 0.15 | 0.12 | 0.06 | 0.05 |
Ethyl octanoate | 0.23 | 0.13 | 0.13 | 0.04 | 0.28 | 0.16 | 0.06 | 0.04 |
Ethyl decanoate | 0.16 | 0.02 | < 0.01 | < 0.01 | 0.13 | 0.06 | < 0.01 | < 0.01 |
Ethyl acetate | 19.3 | 28.8 | 30.5 | 37.7 | 19.1 | 31.0 | 52.5 | 53.4 |
Isoamyl alcool | 25.6 | 27.1 | 27.5 | 27.8 | 24.9 | 26.8 | 29.1 | 29.5 |
Isoamyl acetate | 0.70 | 0.88 | 0.90 | 0.55 | 0.83 | 0.80 | 0.74 | 0.74 |
Isobutanol | 5.5 | N.D. | 5.9 | 8.0 | 4.8 | 7.7 | 10.2 | 11.3 |
Isobutyl acetate | 0.06 | 0.06 | 0.05 | 0.08 | 0.03 | 0.32 | 0.95 | 1.21 |
Propanol | 16.3 | 17.1 | 16.5 | 16.3 | 15.3 | 21.1 | 25.1 | 29.3 |
Phenyl ethanol | 16.8 | 26.4 | N.D. | 53.0 | N.D. | 6.8 | 7.6 | 8.5 |