Fig. 1.Antibacterial activity of AamAP1, AamAP1-Lys and GK-19. (a) Dose-dependent survival ofEscherichia Coli , Klebsiella Pneumoniae , P. Aeruginosa , Enterococcus Faecalis andMethicillin-Resistant Staphylococcus Aureus (MRSA ) treated with different antimicrobial peptides for 12 h. Bacteria (1 × 106 CFU/mL) were incubated with the peptides at concentrations varying from 0 to 20 μM. (n = 5) (b) SEM images of different bacteria 2 hours after incubated with GK-19 at a concentration of 50 μM. Scale bar: 200 nm.