Levels of hepatic Hamp and Rgmc mRNA during prenatal and postnatal liver development. Liver samples were obtained at days 12.5, 14.5, and 17.5 of embryonic development (E12-E17), within 8 hours after birth (P0), during postnatal developmental days (P3-P24), or from adult mice aged 2 to 3 months. Values represent the amount of target mRNA compared to β-actin mRNA (means ± SD; n = 3).