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
< 20K32,146
20K - 40K46,310
40K - 60K33,876
60K - 80K21,109
80K - 100K14,640
100K - 120K10,535
120K - 140K7,051
140K - 160K5,747
160K - 180K4,631
180K - 200K3,377
200K - 220K2,732
220K - 240K2,224
240K - 260K1,696
260K - 280K1,463
280K - 300K1,138
300K - 320K930
320K - 340K874
340K - 360K837
360K - 380K704
>= 380K10,744