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
< 20K33,824
20K - 40K49,327
40K - 60K36,211
60K - 80K23,042
80K - 100K15,776
100K - 120K11,405
120K - 140K7,802
140K - 160K6,495
160K - 180K5,227
180K - 200K3,794
200K - 220K3,203
220K - 240K2,548
240K - 260K1,999
260K - 280K1,727
280K - 300K1,388
300K - 320K1,121
320K - 340K1,047
340K - 360K1,054
360K - 380K860
>= 380K13,201