SLC38A4 has been reported to be imprinted and paternally expressed in mice and not imprinted in
SR et al, 2009 compared the expression in biparental fetuses with parthenogenetic fetuses and
observed patterns supportive of maternal expression in some assays but not others. In view
of the complexity of their results, and the possible maternal expression that contrasts with
paternal expression in mice, more supportive evidence is needed before imprinting of porcine SLC38A4
can be confirmed.