Abstract Background Zrsr1 is a paternally expressed imprinted gene located in the first intron of Commd1. and the Zrsr1 promoter resides in a differentially methylated region (DMR) that is maternally methylated in the oocyte. However. a mechanism for the establishment of the methylation has remained obscure. https://poolsproductscanadas.shop/product-category/hayward-sp1075-1077-series-parts/