pyrosequencing analysis, NLRP2 (NLR family, pyrin domain containing 2) showed subtle preferential
expression of the maternal
allele in 5 of 8 placentas, and allelic imbalance in the heart and kidney from two fetuses (Bjornsson
HT et al, 2008).
Note: Expression studies in the placenta carry the risk that preferential
maternal expression reflects maternal decidual contamination of the specimen. Data from two somatic
issues are insufficient to demonstrate imprinting.