Table 1.
Highly enriched tetranucleotides in the RRM1+2 aptamers
| Tetranucleotide | n | Copies in osk AB (127 nt) | Copies in osk C (76 nt) | Copies in osk 3′ UTR (1041 nt) | Copies in anti-Bru aptamers | Rank among anti-Bru aptamer tetranucleotides |
| U/purine rich (only U or purine) | ||||||
| UUAU | 37 | 5 | 3 | 11 | 74 | 12 |
| UAUG | 24 | 5 | 2 | 9 | 23 | 55 |
| UGGA | 19 | - | - | 3 | 1 | 218 |
| UGUU | 17 | 7 | 1 | 14 | 103 | 5 |
| UUUA | 16 | 4 | 2 | 16 | 57 | 18 |
| C/A rich (at least 3 of the 4 nt are A or C) | ||||||
| AUCA | 27 | - | 1 | 8 | 11 | 90 |
| CAAA | 23 | - | - | 15 | 20 | 147 |
| UCAA | 20 | - | - | 9 | 15 | 74 |
| UCAC | 20 | - | - | 2 | 11 | 90 |
| AAAA | 18 | 3 | 181 | |||
| AAAG | 17 | - | - | 5 | 3 | 181 |
| CAUA | 16 | - | - | 2 | 17 | 71 |
| Other (don't fit in either group above) | ||||||
| UAUC | 22 | - | - | 3 | 35 | 32 |
| UUCU | 19 | 2 | - | 11 | 66 | 15 |
| AGCU | 18 | - | 1 | 5 | 3 | 181 |
| UUCA | 17 | - | - | 2 | 10 | 95 |
| UCUG | 16 | 1 | - | 7 | 40 | 25 |
| UCUA | 16 | 1 | 2 | 5 | 38 | 28 |
| UCUU | 15 | 1 | 1 | 6 | 92 | 7 |
| GUCU | 15 | 1 | 1 | 11 | 81 | 9 |
Tetranucleotides appearing at least 15 times in the RRM 1+2 aptamers are shown.