Fig. 6. Antibacterial activity of (Glc)Ent–Amp/Amx against E. coli CFT073 in the presence of Lcn2 or bovine serum albumin (BSA). E. coli CFT073 was treated with (a) 100 nM (Glc)Ent–Amp 5/7/9 or (b) 100 nM (Glc)Ent–Amx 6/8/10 in the absence (control) and presence of 1 μM Lcn2 or 1 μM BSA. The assays were conducted in modified M9 medium (t = 24 h, T = 37 °C) (mean ± standard deviation, n = 3). An asterisk indicates OD600 < 0.01. The data for the conjugates preloaded with Fe(iii) are presented in Fig. S24.† .
