For heterologous expression, 500 µL of a 37 ºC LB overnight starter culture (supplemented with 50 µg mL -1 kanamycin) was inoculated in 50 mL of M9 minimal medium in 100 mL erlermeyer flasks. Cultures were grown at 37 ºC with shaking (180rpm) until reaching an OD600 of 0.25-0.3, at which point the cultures were placed at 4 ºC during ~1 h. The cultures were then induced with 50 µL of 0.5 mg mL -1 tetracycline. Expression was carried out for 4 days at 20 ºC with shaking (180 rpm). The cultures were harvested by centrifugation (5000 ×g, 10 min at 4 ºC). Cell pellets were extracted with EtOAc (20mL) for 1-2 h with shaking and then centrifuged. The supernatants were transferred to a previously weighted vial and dried in a rotary evaporator. A second extraction was performed using 100% MeOH during 1-2 h with shaking and then centrifuged and the supernatants were transferred to the same vial. In the case of culture supernatants, a liquid-liquid extraction was performed using 3×3 volumes of EtOAc. The organic phases were transferred to a round bottom flask, dried in a rotary evaporator and then transferred to a previously weighted vial. The extracts were weighted, dissolved in MeOH to a concentration of 5 mg mL -1 , filtered (0.2 μm) and used for LC-HRESIMS (or LCHRESIMS/MS) analysis. Differences between the control (E. coli carrying the empty vector pET28-ptetO::gfpv2) and E. coli carrying the pET28-ptetO::micABCDEFG-gfpv2 plasmid were detected by manual inspection of the resulting data.