Table 1 Influence of the pH of MRS broth on production of bacteriocins SD1, SD2, SD3 and SD4 after 24 h incubation at 30 °C. AU Arbitrary units
MRS medium pH | Bacteriocin activity (AU/mL) | |||
|---|---|---|---|---|
SD1 | SD2 | SD3 | SD4 | |
pH 6.2 (control) | 25,600 | 25,600 | 1,600 | 800 |
pH 3.0 | NGa | NG | NG | NG |
pH 4.0 | NG | NG | NG | NG |
pH 5.0 | 800 | 800 | 0 | 0 |
pH 6.0 | 25,600 | 25,600 | 1,600 | 800 |
pH 7.0 | 25,600 | 12,800 | 1,600 | 400 |