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
< 20K32,403
20K - 40K46,645
40K - 60K34,171
60K - 80K21,357
80K - 100K14,793
100K - 120K10,644
120K - 140K7,150
140K - 160K5,843
160K - 180K4,734
180K - 200K3,424
200K - 220K2,783
220K - 240K2,268
240K - 260K1,722
260K - 280K1,502
280K - 300K1,182
300K - 320K961
320K - 340K894
340K - 360K859
360K - 380K718
>= 380K11,080