Percentage of tetracycline‐resistant colonies represent a proxy for the extent of supercoil diffusion inhibition by the various P
rsaA‐
rsaA constructs indicated, each inserted between one
res site and the
tet
R cassette. Error bars represent SD,
n = 3. The ability of each construct to form a CID boundary is indicated on the left (see Figs
2 and
3).