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
< 20K33,177
20K - 40K48,039
40K - 60K35,222
60K - 80K22,172
80K - 100K15,260
100K - 120K11,024
120K - 140K7,421
140K - 160K6,130
160K - 180K4,959
180K - 200K3,580
200K - 220K2,982
220K - 240K2,396
240K - 260K1,855
260K - 280K1,600
280K - 300K1,286
300K - 320K1,014
320K - 340K974
340K - 360K946
360K - 380K794
>= 380K12,093