Fig 1

A: The imprinted genes located at 11p15. CTCF is the chromatin insulator protein CCCTC-binding factor. KCNQ10T1, also known as Lit1, is indicated and is located on the antisense strand in intron 10 of the KCNQ1 gene. CH3 indicates sites of DNA methylation on the different parental alleles. Other genes within the DMR1 and DMR2 are indicated. DMR, differentially methylated region.