Examples of electron density

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Figures from Bernhard Rupp's book "Biomolecular Crystallography" (with permission by the author)

You can see the full-size, high-resolution figure by clicking on it.

Cis-peptide bond and its electron density

 

Covalently modified residues

 

Covalent binding of ligands

 

Additives mediating intermolecular contacts

 

Heavy-atom derivatization of a protein

 

The trimeric bacterial outer membrane protein OprP

 

Chemically modified lysine residue (Dimethyllysine)

 

Glycosylated residues stabilizing homodimer

 

Uranium-atom solution and Fourier truncation ripples

 

Solvent molecules (water, MPD, Mg2+)

 

Split side-chain conformations

 

Se-Met residues and chloride ion