4-class predictions vs. TM-score of the best template. On the x axis is the TM-score between the query and the best template found by PSI-BLAST. The bins' height is proportional to the average Q4 of the map. Red bins represent ab initio predictions, while blue ones are template-based. Results for all sequence separations. The errors of individual bins are in the 0.7–2% range, with all differences greater than the sum of standard deviations of the template and ab initio bins except for the [0,0.1) interval.
Walsh et al. BMC Structural Biology 2009 9:5 doi:10.1186/1472-6807-9-5