Percentage of Active Promoters
| Percentage | |
| Positive in ≥ 1 out of 4 cell types | 91 |
| Positive in ≥ 2 out of 4 cell types | 89 |
| Positive in ≥ 3 out of 4 cell types | 82 |
| Positive in ≥ 4 out of 4 cell types | 76 |
[i] Percentage of putative promoters giving positive luciferase signals in cultured cell transfection assays.