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
< 20K32,222
20K - 40K46,350
40K - 60K33,925
60K - 80K21,136
80K - 100K14,659
100K - 120K10,544
120K - 140K7,070
140K - 160K5,753
160K - 180K4,639
180K - 200K3,379
200K - 220K2,737
220K - 240K2,229
240K - 260K1,703
260K - 280K1,468
280K - 300K1,139
300K - 320K930
320K - 340K877
340K - 360K838
360K - 380K706
>= 380K10,780