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. 2020 Jul 22;146(9):2179–2188. doi: 10.1007/s00432-020-03321-8

Fig. 1.

Fig. 1

The location and biological structure of GNAS gene. aGNAS gene is located at chromosome 20q13.32; b thirteen exons and the upstream alternative first exons of GNAS. The imprinted expression pattern of GNAS is highly complicated, with exclusively maternal expression of NESP55 (red arrow), and exclusively paternal expression of NESPAS, XL exon and exon 1A (green arrow). NESPAS: NESP anti sense