Contents of Interspersed Repeats
| G+C content | Sine | Line | Line1 | LTR elements | DNA transposon-like elements | Unclassified elements | Total interspersed repeats | |
| mouse | ||||||||
| Dlk1-Gtl2 | 49.4% | 9.6% | 3.2% | 3.0% | 1.6% | 0.3% | 0.0% | 14.7% |
| lgf2-H19 | 51.4% | 1.8% | 0.9% | 0.7% | 2.0% | 0.1% | 0.0% | 4.8% |
| genome | 46–50% | 14.4% | n.d. | 3.4% | 9.9% | n.d. | n.d | 28.9% |
| 50–54% | 16.5% | n.d. | 1.4% | 3.6% | n.d. | n.d. | 20.3% | |
| human | ||||||||
| DLK1-GTL2 | 51.4% | 13.5% | 12.6% | 11.6% | 7.4% | 2.3% | 0.0% | 35.8% |
| lGF2-H19 | 59.5% | 3.6% | 4.4% | 3.4% | 3.1% | 1.2% | 0.0% | 12.3% |
| autosomes | 50–54% | 25.5%[ii] | n.d. | 4.8% | 4.7% | 1.8% | n.d. | 41% |
| >54% | 20.1%[ii] | n.d. | 3.0% | 2.9% | 1.2% | n.d. | 31% | |
| X chromosome | 50–54% | 24.9%[ii] | n.d. | 6.1% | 2.7% | 1.1% | n.d. | 38% |
| >54% | 14.8%[ii] | n.d. | 5.3% | 2.8% | 1.0% | n.d. | 26% | |
| sheep | ||||||||
| Dlk1-Gtl2 | 53.7% | 5.5% | 12.0% | 20.5% | 20.5% | 20.5% | 20.5% | 20.5% |
[i] Shown are summaries for the interspersed repeats that were identified using RepeatMasker( http://ftp.genome.washington.edu/index.html ) for the analyzed sequences. The average values for human autosomal and X chromosome linked sequences and mouse genome-wide sequences were taken from Smit (1999). Separate values for mouse autosomes and X chromosome were not available. Because the content of interspersed repeats is related to the G+C content, the values are given for sequences that show G+C contents similar to the imprinted regions analyzed here.
[ii] Sum of the values for Alu and Mir elements; n.d., not defined.