Fig. 2.

Change in CFU numbers with increasing IPTG concentration. For all IPTG concentrations, the same cell culture density was used. a E. coli BL21-Gold(DE3)pLysS and BL21(DE3) strains were transformed with the soluble protein sfGFP while, b BL21-Gold(DE3)pLysS was transformed with the integral membrane protein mdfA. For both figures, standard error bars are included (for a n = 8 to 12 while for b n = 5–6)