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. 2010 Apr 12;38(15):4929–4945. doi: 10.1093/nar/gkq200

Figure 6.

Figure 6.

Paternal allele-specific methylation at the region between GPR1 and ZDBF2 of human chromosome 2 and imprinting of human GPR1. (A) Structure of the human region between GPR1 and ZDBF2. Two methylated regions, DMRh1 and DMRh2, identified in meDIP-on-chip of normal human sperm indicated by filled boxes. The vertical bars represent CpG sites. The horizontal arrows represent primer positions. The extent of the regions analyzed in this study and Genbank accession numbers are shown over the line. (B) Bisulfite-PCR sequencing of genomic DNA prepared from cord blood, placenta and two cases’ sperm. Each row represents a unique methylation profile within the pool of 20 clones sequenced. Closed and open circles represent methylated and unmethylated CpGs, respectively. (C) The paternal-specific expression of GPR1 in human samples. The A/G polymorphic site (SNP ID: rs3755227) in GPR1 exon 3 is indicated by vertical arrow. Heterozygosity was demonstrated in DNA isolated from cord blood with double peaks in chromatographic sequencing data at the polymorphic residues identified (arrow).