Table 1.

Sets of PDB entries in relation to set selection criteria

Set of entries	Counts
PDB overall	59,330
NMR with or without restraints	7,980
NMR with restraints	5,266
With parsed restraints	4,800
With parsed DRs	4,744
Set 1 < 80% restraints linked	415
Set 2 < 33% restraints after filtering left	316
Set 3 maximum DR violation > 2 Å	353
Set 4 Rms DR violation > 0.25 Å	277
Set union of 1–4: (union 1–2: 475, 3–4: 417)	786
‘Good’ set (with parsable restraints minus set union of 1–4)	4,014