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Table 2 Distribution of protein residues over 3-state secondary structure types

From: Secondary structure specific simpler prediction models for protein backbone angles

SS type Training Validation Testing
Residues Percent Residue Percent Residue Percent
Using SS types of residues as in DSSP files
Helix 637,203 38.14 61,814 37.34 116,691 38.06
Sheet 383,140 22.93 38,401 23.20 68,975 22.50
Coil 650,262 38.92 65,315 39.46 120,942 39.45
Using SS types of residues as predicted by SSpro8
Helix 637,996 38.19 61,925 37.41 116,568 38.02
Sheet 384,423 23.01 38,723 23.39 69,303 22.60
Coil 648,186 38.80 64,882 39.20 120,737 39.38