MAGI2 was monoallelically expressed in 4 placentas and the expressed allele could be defined as
paternal in 2 cases. In 3 cases, the expression was found to be biallelic (Barbaux S et al, 2012).
In a survey of 32 tissues, Baran Y et al
(2015) found biallelic expression in 29 and imprinted (or "consistent with imprinted")
expression in three tissues (cultured fibroblasts, cultured lymphoblasts and cultured T cells).
MAGI2 is reported to be
imprinted and monoallelically expressed from maternal allele in mice and cows.
The combination of polymorphic imprinting, absence of imprinting in primary tissues and opposite
parents of origin in human vs mouse and cow,
raises significant doubts about the validity of the authors claims of imprinting.