LY6G6C (lymphocyte antigen 6 family member G6C) was preferentially maternally expressed in chorionic
girdle samples from 5 out of 5 mule/hinny individuals
(RNA-seq and pyrosequencing) suggestive of imprinting. It is not known to be imprinted in any other
species (Wang X et al 2013).
However, Proudhon and Bourc'his (2010) have
cautioned that maternal contamination of placental tissues may cause apparent imprinted maternal
recommend that reports of placental-specific imprinted maternal expression be interpreted with care.