Ec numbers and metals in the PDB
Class 1: Oxidoreductases
Class 2: Transferases
Class 3: Hydrolases
Class 4: Lyases
Class 5: Isomerases
Class 6: Ligases
Distribution of metals among enzymes of the six EC classes
Distribution of the six EC classes among proteins binding different metal ions

Statistics based on a total of 139230 PDB structures
Last database update: 01-20-2019