Figure 5: 3,4-DHBA and 3HBL titres before and after acid treatment.

Culture supernatants from strains MG1 and MG4 were subjected to overnight treatment with 50 mM hydrochloric acid at 37 °C, allowing for effective conversion of 3,4-DHBA to 3HBL. Bars in light colours represent samples before acid treatment, whereas bars in dark colours represent samples after acid treatment.