Figure 4.

The relationship between false-positive information content and the motif width. The figure shows the theoretical upper bound on the information content threshold, D*, when one or more false-positive motif is expected to be observed in a dataset as function of motif width W (dashed line) compared to the strength of false-positive motifs detected by MEME (crosses). For both cases W is chosen from n = {5, 10, 15} and the parameters L = 1000 and n = 30 are fixed. The strength of motifs detected by MEME is consistent with the strength of motifs predicted to occur by chance for the given sample size.