_EC 3.4.1.- (not defined) 0 PDB entries  
EC 3.-.-.- Hydrolases. [22,330 PDB entries]
EC 3.4.-.- Acting on peptide bonds (peptide hydrolases). [7,256 PDB entries]
EC 3.4.1.- (not defined) [-]    
EC 3.4.1.1 Transferred entry: 3.4.11.1. [-]
EC 3.4.1.2 Transferred entry: 3.4.11.2. [-]
EC 3.4.1.3 Transferred entry: 3.4.11.4. [-]
EC 3.4.1.4 Transferred entry: 3.4.11.5. [-]

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