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
0 - 20K25989
20K - 40K33929
40K - 60K24656
60K - 80K14937
80K - 100K10328
100K - 120K7449
120K - 140K4661
140K - 160K3427
160K - 180K2860
180K - 200K2100
200K - 220K1550
220K - 240K1342
240K - 260K919
260K - 280K713
280K - 300K552
300K - 320K473
320K - 340K423
340K - 360K406
360K - 380K322
> 380K4379