|  | conserved | duplication | repeats | Exon age difference * | ||
---|---|---|---|---|---|---|---|
 |  |  |  |  | Upstream young | equal | Upstream old |
human mouse | ME | 18 (30.0%) | 24 (40.0%) | 8 (13.3%) | 17 | 33 | 10 |
 | IND | 16 (1.41%) | 29 (2.55%) | 356 (31.3%) | 419 | 460 | 258 |
 | LNK | 40 (4.18%) | 25 (2.61%) | 55 (5.74%) | 125 | 741 | 91 |
 | ME | 18 (30.0%) | 25 (41.7%) | 6 (10.0%) | 18 | 31 | 11 |
 | IND | 18 (4.25%) | 6 (1.42%) | 100 (23.6%) | 154 | 195 | 75 |
 | LNK | 56 (10.1%) | 11 (2.17%) | 12 (2.37%) | 74 | 389 | 44 |