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
< 20K31,469
20K - 40K45,259
40K - 60K33,121
60K - 80K20,293
80K - 100K14,146
100K - 120K10,189
120K - 140K6,824
140K - 160K5,278
160K - 180K4,422
180K - 200K3,203
200K - 220K2,633
220K - 240K2,092
240K - 260K1,583
260K - 280K1,370
280K - 300K1,057
300K - 320K878
320K - 340K815
340K - 360K799
360K - 380K644
>= 380K9,783