Peg13 (Paternally expressed gene 13) is a non-coding RNA expressed exclusively from the paternal
allele in day 13 fetuses, and exclusively or predominantly from the paternal allele in seven adult
mouse tissues tested. It is located within intron 16 of Trappc9 (Nibp) and is associated with
a maternally methylated differentially methylated region (Smith
R.J. et al. 2003).