FIG. 3.

Boundary activity in disruption strains. We used patch mating assays to analyze the ability of GBD barrier chimeras to block silencing in strains from which specific genes were deleted. Each strain was transformed with the different plasmids as described in the legend of Fig. 2 and assayed on the same plate. (−) and (+), constructs without and with Aal4p binding sites, respectively; wt, wild type.