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
< 20K29643
20K - 40K41632
40K - 60K30538
60K - 80K18634
80K - 100K12942
100K - 120K9332
120K - 140K6140
140K - 160K4565
160K - 180K3816
180K - 200K2780
200K - 220K2172
220K - 240K1803
240K - 260K1314
260K - 280K1064
280K - 300K844
300K - 320K702
320K - 340K657
340K - 360K609
360K - 380K528
>= 380K7294