FIGURE 5. Comparative mammalian analysis for a representative eutherian imprinted gene cluster (PEG1/MEST).
From the following article:
Genome analysis of the platypus reveals unique signatures of evolution
A list of authors and their affiliations appears at the end of the paper
Nature 453, 175-183(8 May 2008)
doi:10.1038/nature06936
a, The gene arrangement is conserved between mammals. However, non-coding regions are expanded in therians. Arrows indicate genes and the direction of transcription; the scale shows base pairs. b, Summary of repeat distribution for the PEG1/MEST cluster. Histograms represent the sequence (%) masked by each repeat element within the MEST cluster; black bars represent repeat distribution across the entire genome. With the exception of SINEs, platypus has fewer repeats of LINEs, LTRs, DNA and simple repeats (Simple) than eutherian mammals. Low comp., low complexity; sRNAs, small RNAs.