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
< 20K31,728
20K - 40K45,680
40K - 60K33,397
60K - 80K20,743
80K - 100K14,315
100K - 120K10,314
120K - 140K6,921
140K - 160K5,607
160K - 180K4,508
180K - 200K3,279
200K - 220K2,657
220K - 240K2,139
240K - 260K1,622
260K - 280K1,397
280K - 300K1,070
300K - 320K904
320K - 340K840
340K - 360K819
360K - 380K673
>= 380K10,134