Fig. 1.
Overview of the imprinted region 15q11q13. Schematic overview of the genes located within the PWS and AS critical region on chromosome 15q11q13. Upper part - paternal allele (pat), lower part - maternal allele (mat). Blue boxes/vertical lines represent paternally expressed genes/snoRNAs; red box, maternally expressed gene; black boxes, biallelically expressed genes and arrow heads represent the orientation of transcription. IC imprinting centre, BP common breakpoint cluster region, cen centromeric, tel telomeric. Modified from Ramsden et al. [1]