Evaluation of predictive capabilities as a function of the threshold using dyad sweeping. Different thresholds, defined as number of overlapping matches, were evaluated for all regulons. This graph shows the case of the PurR regulon when the dyads are obtained from the known binding sites and the evaluation is carried out on the 400+50 regions. The only dyads used in the search were those found at the ROMs with the highest value per region in the PurR regulon. The statistical parameters (see Table 5) are plotted as percentages instead of fractions. The arrow indicates the point of maximum overall performance (OP) (see text).