Side chains were rebuilt using five different methods in a set of 94 high-resolution protein structures. The average statistics on side chain prediction accuracy was calculated in terms of side chain RMSD, contact score, and chi-angle prediction accuracy. Side chain RMSD was calculated for side chain atoms except Cβ. A residue was considered as exposed or buried if its relative solvent exposed area is greater or less than 15%, respectively. Contact score reflects amount of correctly predicted atom-atom contacts and is calculated as described in Methods.