FIG. 3.

Amplicons elicited across integration sites, in response to antibiotics and bile salts. E. coli O157:H7 strain 87-20 was grown in LB without (lanes 1 and 2) or with (lanes 3 and 4) TMP-SMX, ciprofloxacin (lanes 5 and 6), or ampicillin (lanes 7 and 8) or in LB with G-6-P without (lanes 9 and 10) or with (lanes 11 and 12) fosfomycin. Samples in even-number lanes were grown in bile salts. Loci examined and lengths of resulting amplicons are listed to the right and left of the rows. LJ, left junction; RJ, right junction.