New Features


Visualize Electron Density Maps For Bound Ligands


View sigma-weighted 2m|Fo|-d|Fc| electron density "mini-maps" for bound ligands using the JSmol 3D View. This feature is available for ligands with more than one atom (ions excluded) in PDB entries with structure factor data. Different sigma values can be selected.

The feature can be accessed from an entry's Structure Summary page in the Small Molecule section or from the bottom of the 3D View page.

RCSB PDB News ImageElectron density mini-map for Retinoic Acid in PDB ID 1CBS at sigma level 1. In this example, the ligand fits well into the density.
RCSB PDB News ImageElectron density mini-map for Thymidine-5'-Phosphate in PDB ID 3HW4 at sigma level 2. Electron density is only available for part of the ligand.
RCSB PDB News ImageElectron Density (JSmol) button from the Structure Summary page for PDB entry 1CBS.