Fig 1. Extraembryonic-specific imprinted genes in the mouse genome.
Genes reported to show imprinted gene expression almost exclusively in placenta and/or visceral endoderm [5,33,35–40]. Red genes are maternally expressed, whereas blue genes are paternally expressed. Genes that are noncanonically imprinted are underlined. Asterisks mark genes that are imprinted by an alternative mechanism in somatic tissues.