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
< 20K35,132
20K - 40K51,970
40K - 60K37,938
60K - 80K24,349
80K - 100K16,837
100K - 120K12,099
120K - 140K8,475
140K - 160K7,052
160K - 180K5,756
180K - 200K4,204
200K - 220K3,583
220K - 240K2,822
240K - 260K2,292
260K - 280K1,965
280K - 300K1,550
300K - 320K1,283
320K - 340K1,207
340K - 360K1,205
360K - 380K991
>= 380K15,350