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
< 20K35,325
20K - 40K52,515
40K - 60K38,276
60K - 80K24,671
80K - 100K17,031
100K - 120K12,260
120K - 140K8,611
140K - 160K7,190
160K - 180K5,851
180K - 200K4,299
200K - 220K3,674
220K - 240K2,913
240K - 260K2,369
260K - 280K2,019
280K - 300K1,613
300K - 320K1,312
320K - 340K1,232
340K - 360K1,229
360K - 380K1,029
>= 380K15,848