This gene expresses a paternally imprinted antisense transcript of the insulin-like growth factor 2 gene. The transcript is overexpressed in Wilms' tumor. This gene is predicted to be non-coding because the predicted protein is not conserved in any other species and the majority of transcripts would be candidates for non-sense mediated decay (NMD) if a protein were expressed. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2009]