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
< 20K33,848
20K - 40K49,368
40K - 60K36,249
60K - 80K23,064
80K - 100K15,793
100K - 120K11,422
120K - 140K7,833
140K - 160K6,507
160K - 180K5,231
180K - 200K3,801
200K - 220K3,210
220K - 240K2,549
240K - 260K2,002
260K - 280K1,728
280K - 300K1,395
300K - 320K1,125
320K - 340K1,047
340K - 360K1,055
360K - 380K862
>= 380K13,282