Table 1.

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

Percentage of putative promoters giving positive luciferase signals in cultured cell transfection assays.