- z-score of protein access the quality of model using the normalized DOPE (Discrete Optimized Potential Energy) method. The DOPE is based on an improved reference state that corresponds to noninteracting atoms in a homogenous sphere with the radius dependent on sample native structure and thus it counts for the finite and spherical shape of the native structures. A positive Z-score are likely to be poor models, while the scores lower than −1 or so are likely to be good acceptable model. GA341: GA341 parameter derived from the statistical potential and shows the reliability of a protein model. A model is predicted to be most reliable when the model score is higher than pre-specified cutoff (0.7) and has probability of the correct fold that is larger than 95 %. A protein model is considered correct when the C-alpha atom superpose within 3.5Ao of their correct position. z-pair: A pairwise statistical potential that contributes to GA341. z-surf: a surface statistical potential that contributes to GA341. z-combi: a combined statistical potential that contributes to GA341
