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
< 20K33,001
20K - 40K47,470
40K - 60K34,809
60K - 80K21,780
80K - 100K15,134
100K - 120K10,898
120K - 140K7,299
140K - 160K6,022
160K - 180K4,887
180K - 200K3,524
200K - 220K2,907
220K - 240K2,353
240K - 260K1,824
260K - 280K1,562
280K - 300K1,257
300K - 320K990
320K - 340K947
340K - 360K927
360K - 380K775
>= 380K11,814