SNRPN (small nuclear ribonucleoprotein polypeptide N) showed 100% paternal expression in 4 mule and
2 hinny day 33 chorionic girdle (CG) samples. SNRPN was
imprinted in the corresponding whole fetuses. PAR-SN, which is part of the extended SNRPN
transcript, also showed
100% paternal expression in CG samples and fetal tissues (Wang X et al 2013).