Inactivation of CTSE gene by insertion of interspersed elements. Genetic map of the CTSE locus in the platypus genome showing the disruption of exons 7 and 9 by interspersed elements. Top and bottom panels show a more detailed view of exons 7 and 9, respectively, indicating the nucleotide sequence of exons and the disrupting long interspersed element (LINE)2 and short interspersed element (SINE) elements. bp, base pairs.
Ordoñez et al. Genome Biology 2008 9:R81 doi:10.1186/gb-2008-9-5-r81