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
< 20K31287
20K - 40K44948
40K - 60K32924
60K - 80K20164
80K - 100K14018
100K - 120K10106
120K - 140K6766
140K - 160K5203
160K - 180K4377
180K - 200K3175
200K - 220K2581
220K - 240K2067
240K - 260K1559
260K - 280K1358
280K - 300K1038
300K - 320K861
320K - 340K803
340K - 360K782
360K - 380K624
>= 380K9618