Table 6.
Functional elements in UTRsite collection annotated in UTRdb entries
| Functional elements | Localization (UTR) | Number of annotated entries* |
| 15-lipoxygenase differentiation control element (15-LOX-DICE) | 3' | 94 |
| Adh mRNA down-regulation element | 3' | 61 |
| Amyloid precursor protein 3' UTR destabilizing element | 3' | 15 |
| Class 2 AU-rich elements (ARE2) | 3' | 70 |
| Bruno-responsive element (BRE) | 3' | 199 |
| Barley yellow dwarf virus (bydv) | 5' and 3' | 6 |
| Cytoplasmic polyadenylation element (CPE) | 3' | 5,186 |
| GLUT1 mRNA-stability control element | 5' and 3' | 66 |
| Histone mRNA 3' UTR stem loop | 3' | 38 |
| Iron responsive element (IRE) | 5' and 3' | 121 |
| Internal ribosome entry site (IRES) | 5' | 7,356 |
| Msl-2 3' UTR control element | 3' | 19 |
| Msl-2 5' UTR control element | 5' | 5 |
| Nanos translation control element | 3' | 1 |
| Ribosomal S12 mRNA translational control element | 5' | 2 |
| Selenocysteine insertion sequence type 1 (SECIS-1) | 3' | 1,773 |
| Selenocysteine insertion sequence type 2 (SECIS-2) | 3' | 355 |
| Tra-2 and GLI element (TGE) | 3' | 81 |
| TNF-α mRNA stability control element | 3' | 8 |
| Terminal oligopyrimidine tract (TOP) | 5' | 272 |
| Upstream ORF | 5' | 71,438 |
| Vimentin mRNA 3' UTR control element | 3' | 6 |
*The number of genes in UTRdb [47] in which the structure is found as of June 2001.