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
< 20K33,760
20K - 40K49,211
40K - 60K36,115
60K - 80K22,860
80K - 100K15,750
100K - 120K11,364
120K - 140K7,746
140K - 160K6,449
160K - 180K5,194
180K - 200K3,776
200K - 220K3,179
220K - 240K2,535
240K - 260K1,972
260K - 280K1,713
280K - 300K1,379
300K - 320K1,120
320K - 340K1,034
340K - 360K1,027
360K - 380K858
>= 380K13,071