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Table 2 "Fluffiness" predictions for three types of functional region, showing the number of fluffy (F>2) sequences, the number of non-fluffy (F<2) sequences and corresponding positive and negative prediction rates, for each type of the region.

From: Some statistical properties of regulatory DNA sequences, and their use in predicting regulatory regions in the Drosophila genome: the fluffy-tail test

Functional type Fluffy tails (F>2) No fluffy tails (F<2) Positive rate Negative rate
Regulatory regions 51 9 85 % 15 %
Exons 1 59 1.6 % 98.4 %
Non-coding presumed non- regulatory 10 50 16 % 84 %