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
< 20K31105
20K - 40K44387
40K - 60K32579
60K - 80K19968
80K - 100K13886
100K - 120K10007
120K - 140K6693
140K - 160K5122
160K - 180K4309
180K - 200K3128
200K - 220K2505
220K - 240K2017
240K - 260K1520
260K - 280K1343
280K - 300K1021
300K - 320K824
320K - 340K792
340K - 360K750
360K - 380K597
>= 380K9316