Experimental and computer-assisted approaches have led us to identify hundreds of small non-coding RNA (ncRNAs) whose genes - clustered at two chromosomal domains (the DLK1-GTl2 region/human 15q11q13 and the SNURF-SNRPN/human 14q32 loc) - are subjected to genomic imprinting. Here, we discuss their genomic organization, their expression pattern and their potential functions.
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