Electron Density Maps and Coefficient Files at RCSB PDB (source code)

= Electron Density Maps and Coefficient Files at RCSB PDB
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https://www2.rcsb.org/docs/general-help/electron-density-maps-and-coefficient-files

Primary archive documentation, Introduction to Electron Density Maps: coordinates versus experimental structure factors, observed/calculated map coefficients, difference maps, poorly resolved regions and validation. Coefficient files contain weighted amplitudes and phases.