_EC 1.2.4.- With a disulfide as acceptor. 90 PDB entries  
EC 1.-.-.- Oxidoreductases. [21,435 PDB entries]
EC 1.2.-.- Acting on the aldehyde or oxo group of donors. [1,276 PDB entries]
EC 1.2.4.- With a disulfide as acceptor. [90 PDB entries]
EC 1.2.4.1 pyruvate dehydrogenase (acetyl-transferring). [26 PDB entries]
EC 1.2.4.2 oxoglutarate dehydrogenase (succinyl-transferring). [32 PDB entries]
EC 1.2.4.3 Transferred entry: 1.2.4.4. [-]
EC 1.2.4.4 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring). [32 PDB entries]

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