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 - 20K27224
20K - 40K36697
40K - 60K26536
60K - 80K16145
80K - 100K11236
100K - 120K8053
120K - 140K5127
140K - 160K3747
160K - 180K3186
180K - 200K2326
200K - 220K1776
220K - 240K1486
240K - 260K1012
260K - 280K833
280K - 300K651
300K - 320K529
320K - 340K502
340K - 360K448
360K - 380K379
> 380K5192