To induce expression of different chaperone combinations, Larabinose (0.5 mg ml21) or tetracycline (8 ng ml21) was added, as required. After this, lipBL was expressed as described above. For the E.coli/pET-LipBL/pGro7 clone, 0.5 mg arabinose ml21 was initially added to induce expression of the chaperone system and the inoculated medium was then incubated under aerobic conditions at
37 uC to OD600 0.6, followed by induction with IPTG (1 mM finalconcentration) and incubation under aerobic conditions for 3 h at 30 uC to induce expression of LipBL