Fig. 1.

Structural taxonomy of plant and animal LIMEs. The plant genome set consists of Arabidopsis, soybean, rice, cottonwood, sorghum, and grape. The animal genome set is dog, chicken, human, mouse, macaque, and rat. LIMEs (≥100 bp) are identified for every pair of plant genomes and every pair of animal genomes, and categorized. A pie chart shows the percentage of contribution of each LIME category connected with the pie chart. Because of the lack of the annotation for all species involved, the last classification level, Origin Class, includes the percentages for Arabidopsis LIMEs in plants (*) and the percentages for the animal LIMEs in human, mouse, rat, and chicken (**); the absolute numbers are given in SI Appendix, Table S5. We have defined telomeric repeats as syntenic for clarity. LINEs, long interspersed elements; SINES, short interspersed elements.