Sf6 interacts with entire OmpA surface. The crystal structure of E. coli OmpA (PDB ID: 1BXW [55]) is depicted as a ribbon diagram with substituted amino acids shown as spheres: red, P25; orange, D66; yellow, N67; green, I68; blue, A108; violet, P111; and black, N155 using UCSF Chimera [56].