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
< 20K33,536
20K - 40K48,751
40K - 60K35,877
60K - 80K22,652
80K - 100K15,613
100K - 120K11,252
120K - 140K7,644
140K - 160K6,376
160K - 180K5,113
180K - 200K3,709
200K - 220K3,114
220K - 240K2,489
240K - 260K1,921
260K - 280K1,665
280K - 300K1,338
300K - 320K1,091
320K - 340K1,009
340K - 360K1,000
360K - 380K836
>= 380K12,719