Table 4.
Distribution of Repetitive Elements
| Number of elements/ [percentage of sequence (human)] | Number of elements in aligned regions (human) | Number of elements/ [percentage of sequence (mouse)] | Number of elements in aligned regions (mouse) | |
| Alu | 183 (21.77) | 55 | — | — |
| B1 | — | — | 156 (18.32) | 69 |
| B2 | — | — | 85 (8.25) | 32 |
| B4 | — | — | 36 (6.51) | 18 |
| ID | — | — | 30 (2.32) | 16 |
| MIR | 29 (1.86) | 18 | 8 (0.34) | 8 |
| LINE1 | 9 (2.15) | 2 | 9 (0.85%) | 3 |
| LINE2 | 14 (1.52) | 5 | 5 (0.21) | 3 |
| MaLR | 2 (0.39) | 0 | 24 (1.61) | 7 |
| Retroviruses | 2 (0.9) | 0 | 4 (0.36) | 2 |
| MER4_group | 1 (0.2) | 0 | 0 | 0 |
| MER1 type | 6 (0.37) | 3 | 3 (0.18) | 2 |
| MER2 type | 5 (0.23) | 2 | 3 (0.27) | 2 |
| Small RNA | 2 (0.04) | 1 | 7 (0.22) | 6 |
| Simple repeats | 62 (2.44) | 38 | 107 (3.35) | 64 |
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The distribution of human and mouse sequences between the first exon of CD4 and the penultimate exon of C6 (columns 1 and 3), and the four unmasked aligned fragments (columns 2 and 4) were determined by RepeatMasker (“.tbl” output), with slight modifications.
