Chemical component search
The Chemical Component Dictionary gives detailed chemical descriptions of all residue and small molecule components found in PDB entries including standard and modified amino acids/nucleotides, small molecule ligands and solvent molecules.
28376 chemical components - 26682 as free ligands in 116689 PDB files - 2077 as non-standard polymeric components in 26515 PDB files
Ligand Expo is another browser for the Chemical Component Dictionary and supports searches for current and obsolete chemical components.
