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The Ramachandran plot of 10-fold cross-validated predictions of 2640 proteins by a previous real-value prediction method called Real-SPINE 3 (A), by combining a two-state classifier with real value prediction, SPINE X (B), post-refinement, SPINE XI (C), and native dihedral angles (D). The ψ axis is shifted for a clearer view of the population separation. No shift was done on the ϕ angles.
