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
< 20K34,263
20K - 40K50,193
40K - 60K36,895
60K - 80K23,595
80K - 100K16,102
100K - 120K11,680
120K - 140K8,032
140K - 160K6,702
160K - 180K5,448
180K - 200K3,950
200K - 220K3,373
220K - 240K2,637
240K - 260K2,122
260K - 280K1,822
280K - 300K1,460
300K - 320K1,193
320K - 340K1,103
340K - 360K1,109
360K - 380K905
>= 380K14,123