The phylogeny of placental evolution through dynamic integrations of retrotransposons

K Imakawa, S Nakagawa - Progress in molecular biology and translational …, 2017 - Elsevier
Trophoblasts, a major constituent of the placenta, are known to express genes derived from
various endogenous retroviruses (ERVs) as well as LTR retrotransposons. However, the
evolutionary significance of ERV-derived genes involved in placental development has not
been well characterized. In this review, we catalog the diverse morphology of placental
structure among mammalian species with note of counterintuitive developments. We then
detail the history of ancient placenta development with paternally expressed gene 10 …