Table 1.
Frequency of tetranucleotide sequences within 200 nt upstream of polyadenylation sites
| M. musculus | D. rerio | D. melanogaster | C. elegans | S. cerevisiae | S. pombe | A. thaliana | |
|---|---|---|---|---|---|---|---|
| GAAA | 18.7 | 17.0 | 17.2 | 21.6 | 20.0 | 17.7 | 19.6 |
| CAAA | 15.9 | 16.6 | 19.3 | 22.2 | 15.2 | 16.4 | 18.1 |
| AAAA | 24.1 | 23.2 | 24.9 | 25.0 | 27.1 | 25.6 | 22.1 |
| UAAA | 29.8 | 29.9 | 28.4 | 20.1 | 26.1 | 28.2 | 22.2 |
| UAUG | 11.5 | 13.3 | 10.2 | 10.2 | 11.6 | 12.1 | 18.1 |
The frequency of each sequence is expressed as the percentage of the total of all five sequences in order to normalize the different number of entries for each species.