| Gm23238 / predicted gene, 23238 / RNU1-22P* / RNA, U1 small nuclear 22, pseudogene* | ENSMUSG00000064941 | 81 |
| Gm24924 / predicted gene, 24924 | ENSMUSG00000094306 | 80 |
| Gm26244 / predicted gene, 26244 | ENSMUSG00000095616 | 80 |
| Gm26444 / predicted gene, 26444 / RNVU1-6* / RF00003* / RNVU1-1* / RNVU1-3* / RNVU1-4* / RNA, variant U1 small nuclear 1* / RNA, variant U1 small nuclear 3* / RNA, variant U1 small nuclear ... | ENSMUSG00000093815 | 79 |
| Gm23804 / predicted gene, 23804 | ENSMUSG00000094826 | 79 |
| Rnu1a1 / U1a1 small nuclear RNA | ENSMUSG00000095969 | 79 |
| Gm22068 / predicted gene, 22068 | ENSMUSG00000096205 | 79 |
| Gm22317 / predicted gene, 22317 | ENSMUSG00000096206 | 79 |
| Gm22634 / predicted gene, 22634 | ENSMUSG00000096214 | 79 |
| Gm23686 / predicted gene, 23686 | ENSMUSG00000096391 | 79 |
| Gm25679 / predicted gene, 25679 / RNVU1-6* / RF00003* / RNVU1-1* / RNVU1-3* / RNVU1-4* / RNA, variant U1 small nuclear 1* / RNA, variant U1 small nuclear 3* / RNA, variant U1 small nuclear ... | ENSMUSG00000096659 | 79 |
| Gm23511 / predicted gene, 23511 / RNU1-70P* / RNA, U1 small nuclear 70, pseudogene* | ENSMUSG00000065018 | 78 |
| Gm23540 / predicted gene, 23540 | ENSMUSG00000088168 | 78 |
| Gm24305 / predicted gene, 24305 | ENSMUSG00000095590 | 78 |
| Gm25818 / predicted gene, 25818 | ENSMUSG00000096147 | 78 |
| Gm22513 / predicted gene, 22513 | ENSMUSG00000096349 | 78 |
| Gm25581 / predicted gene, 25581 | ENSMUSG00000065344 | 77 |
| Gm25189 / predicted gene, 25189 | ENSMUSG00000065845 | 77 |
| Gm26110 / predicted gene, 26110 | ENSMUSG00000065905 | 77 |
| Rnu1b2 / U1b2 small nuclear RNA | ENSMUSG00000093834 | 77 |
