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
< 20K35,312
20K - 40K52,477
40K - 60K38,223
60K - 80K24,632
80K - 100K17,005
100K - 120K12,251
120K - 140K8,600
140K - 160K7,179
160K - 180K5,840
180K - 200K4,292
200K - 220K3,663
220K - 240K2,907
240K - 260K2,356
260K - 280K2,018
280K - 300K1,612
300K - 320K1,310
320K - 340K1,230
340K - 360K1,224
360K - 380K1,023
>= 380K15,784