Comparison of quality assessment scores for elongated versus globular Rev structural models. Quality assessment scores for all Rev models were obtained using QMEAN , and ProQ2 . Each graph shows the distribution of model quality scores for elongated models (black circles) versus globular models (grey circles) for the indicated Rev protein sequence. Quality scores range from 0 (worst) to 1 (best) for both QMEAN and ProQ2. The score distributions for elongated and globular models displayed considerable overlap, although elongated models tended to have higher scores.