TABLE 2.
HS-GC measurement of volatile compounds produced by ATF deletion strains after 36 h of fermentation
| Compound | Concn (mg liter−1)a
|
|||
|---|---|---|---|---|
| BY4742 (atf1Δ) | BY4742 (atf2Δ) | BY4742 (atf1Δ atf2Δ) | BY4742 (wild type) | |
| Ethyl acetate | 13.0 (0.62) | 18.2 (0.87) | 10.8 (0.52) | 20.8 |
| Isoamyl acetate | 0.22 (0.16) | 1.13 (0.82) | 0.05 (0.04) | 1.37 |
| Ethyl hexanoate | 1.17 (1.05) | 1.13 (1.01) | 1.12 (1.00) | 1.12 |
| Ethyl octanoate | 0.38 (1.01) | 0.34 (0.92) | 0.37 (0.98) | 0.38 |
| Isoamyl alcohol | 112 (1.06) | 104 (0.98) | 109 (1.03) | 106 |
| Isobutanol | 22.9 (0.92) | 23.4 (0.94) | 22.7 (0.91) | 25.0 |
| Propanol | 27.1 (0.98) | 27.4 (0.99) | 25.5 (0.92) | 27.7 |
| Acetaldehyde | 30.9 (0.91) | 31.9 (0.94) | 35.5 (1.05) | 34.0 |
| DMS | 0.27 (1.14) | 0.24 (0.99) | 0.27 (1.12) | 0.24 |
a
Results are averages from six independent fermentations. Values in parentheses show the value relative to that for the wild type. Values that are significantly (α = 0.05) different from those for the wild-type strain are in bold. Standard deviations were typically about 10% of the values and did not exceed 20%.