Fig. 8

IGC percentile ROC curves in Gibbs sampling and MEME. Prokaryotic motifs are distinguished from synthetic motifs on the basis of IGC percentile. Synthetic motifs were derived either from Gibbs sampling (left) or MEME (right), performing motif discovery on either E. coli coding sequences or a random mononucleotide model. For Gibbs sampling, AUC values are approximately 0.60 for E. coli sequences and 0.65 for synthetic sequences. For MEME, AUC values are approximately 0.38 for E. coli sequences and 0.44 for synthetic sequences