5' Donor splice site
Number of entries by base substitution
| Invariant G at +1 | Number of entries |
| G > A | 823 |
| G > T | 338 |
| G > C | 229 |
| Invariant T at +2 | Number of entries |
| T > A | 92 |
| T > G | 118 |
| T > C | 216 |
3' Acceptor splice site
Number of entries by base substitution
| Invariant A at -2 | Number of entries |
| A > T | 87 |
| A > G | 468 |
| A > C | 117 |
| Invariant G at -1 | Number of entries |
| G > A | 398 |
| G > T | 145 |
| G > C | 235 |
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