PDB Statistics: PDB Data Distribution by Molecular Weight (Structure)

All macromolecules, small molecules, and ions are included, except for water molecules. Molecular weight is calculated for all atoms, including those not observed in the experiment. Molecular weight of all non-water atoms in the asymmetric unit.

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Molecular Weight (Daltons)Number of Entries
< 20K33,447
20K - 40K48,560
40K - 60K35,727
60K - 80K22,543
80K - 100K15,540
100K - 120K11,200
120K - 140K7,594
140K - 160K6,267
160K - 180K5,072
180K - 200K3,685
200K - 220K3,078
220K - 240K2,460
240K - 260K1,904
260K - 280K1,646
280K - 300K1,320
300K - 320K1,059
320K - 340K999
340K - 360K992
360K - 380K826
>= 380K12,559