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
< 20K29802
20K - 40K42103
40K - 60K30811
60K - 80K18780
80K - 100K13081
100K - 120K9398
120K - 140K6218
140K - 160K4664
160K - 180K3869
180K - 200K2810
200K - 220K2202
220K - 240K1838
240K - 260K1340
260K - 280K1077
280K - 300K862
300K - 320K717
320K - 340K679
340K - 360K620
360K - 380K535
>= 380K7532