Allele-specific alteration of local chromatin structure. (A) Alterations of local chromatin structure in decoy ZF-Sss1–expressing MCF7 cells. (B) Biallelic alteration of local chromatin structure near IGF2 promoters. After PCR, two parental alleles were distinguished by Bfa1 polymorphic restriction enzyme. (C) Monoallelic alteration of local chromatin structure in the IGF2 DMR2 region. Two parental alleles were separated by NalIII polymorphic restriction enzyme.