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9mers from cullpdb

The dataset consists of protein fragments of length nine, called 9mers, derived from 3,733 proteins selected by cullpdb [1]. All proteins have 1) resolution less than 1.6 angstrom, 2) R-factor less than 0.25, 3) sequence identity below 20%. In addition, all proteins with identity above 20% to CASP13 targets are removed. All torsion angle-pairs are in the allowed region of the Ramachandran plot (fragments containing outliers were detected by the Ramalyze function of the crystallography software PHENIX [1] and removed). The dataset has ~158,000 entries randomly split into train, test, and validation sets with a 60/20/20 split.