TnpX-mediated repression of PattCI. β-Galactosidase assays were performed by using strains CB454(pJIR2085, pJIR1835), labeled pJIR2085, and CB454(pSU39, pJIR1835), labeled pSU39. Assays were performed as described previously (14), with data represented in Miller units. Data are the averages of three biological replicates. Error bars represent standard deviations.