
Precision-recall curves representing the fourfold cross-validation (cv) results on (A) the data set of HP-LC (stem, A-stretch) pairs (169 negatives and 21 positives, 11.05% positive rate, 0.7 AUPRC), and (B) the data set of IP-LC (stem, A-stretch) pairs (116 negatives and 11 positives, 8.66% positive rate, 0.35 AUPRC). The line of precision-recall break-even points is shown as blue dots.










