This six well-studied imprinted clusters and their associated ncRNAs are listed with the macro ncRNA name, sizes of unspliced and spliced variants,genomic size if different from the longest unspliced version, and cellular localisation [note that nuclear localisation was sometimes inferred from RNA FISH (see Glossary, Box 1) data that did not exclude export to the cytoplasm]. Silencing function and hosted small ncRNAs are indicated. References: ¹(Wutz et al.,1997), ²(Lyle et al., 2000), ³(Seidl et al., 2006), ⁴(Sleutels et al.,2002), ⁵(Watanabe et al., 2008), ⁶(Smilinich et al.,1999), ⁷(Pandey et al., 2008), ⁸(Mancini-Dinardo et al.,2006), ⁹(Terranova et al., 2008), ¹⁰(Shin et al.,2008), ¹¹(Landers et al., 2004), ¹²(Gerard et al.,1999), ¹³(Le Meur et al., 2005), ¹⁴(Cavaille et al.,2000), ¹⁵(Huttenhofer et al.,2001), ¹⁶(Skryabin et al., 2007), ¹⁷(Ding et al.,2005), ¹⁸(de los Santos et al., 2000), ¹⁹(Wevrick and Francke,1997), ²⁰(Chamberlain and Brannan,2001), ²¹(Wroe et al., 2000), ²²(Williamson et al.,2002), ²³(Holmes et al., 2003), ²⁴(Li et al., 2000), ²⁵(Royo et al.,2006), ²⁶(Liu et al., 2000), ²⁷(Pachnis et al.,1984), ²⁸(Pachnis et al., 1988), ²⁹(Brannan et al.,1990), ³⁰(Schmidt et al., 1999), ³¹(Cai and Cullen,2007), ³²(Moore et al., 1997), ³³(Labialle et al.,2008), ³⁴(Seitz et al., 2004), ³⁵(da Rocha et al., 2008), ³⁶(Tierling et al.,2006), ³⁷(Lagos-Quintana et al.,2002), ³⁸(Houbaviy et al., 2003), ³⁹(Kim et al.,2004), ⁴⁰(Seitz et al., 2003), ⁴¹(Cavaille et al.,2002), ⁴²(Xiao et al., 2006), ⁴³(Schuster-Gossler et al.,1998), ⁴⁴(Schmidt et al., 2000), ⁴⁵(Miyoshi et al.,2000), ⁴⁶(Davis et al., 2005), ⁴⁷(Hatada et al.,2001).

C, cytoplasmic; ImsnoRNA, snoRNAs at the Irm locus; MBII, mouse brain 2; mmu-mir, Mus musculus microRNA; N, nuclear; n.d., not determined.

Renamed from Air by HUGO nomenclature committee.

Provisional name.

By RNA FISH.

By whole-mount in situ hybridisation.