_EC 6.4.1.- Ligases that form carbon-carbon bonds. 95 PDB entries  
EC 6.-.-.- Ligases. [1,591 PDB entries]
EC 6.4.-.- Forming carbon-carbon bonds. [95 PDB entries]
EC 6.4.1.- Ligases that form carbon-carbon bonds. [95 PDB entries]    
EC 6.4.1.1 Pyruvate carboxylase. [19 PDB entries]
EC 6.4.1.2 Acetyl-CoA carboxylase. [65 PDB entries]
EC 6.4.1.3 Propionyl-CoA carboxylase. [10 PDB entries]
EC 6.4.1.4 Methylcrotonoyl-CoA carboxylase. [1 PDB entries]
EC 6.4.1.5 Geranoyl-CoA carboxylase. [-]
EC 6.4.1.6 Acetone carboxylase. [-]
EC 6.4.1.7 2-oxoglutarate carboxylase. [-]
EC 6.4.1.8 Acetophenone carboxylase. [-]

[-] signifies that there are no PDB entries for the given enzyme subclass