1.2.4.2	oxoglutarate dehydrogenase (succinyl-transferring)	2-oxoglutarate decarboxylation to succinyl-CoA	
1.8.1.4	dihydrolipoyl dehydrogenase	2-oxoglutarate decarboxylation to succinyl-CoA	
2.3.1.61	dihydrolipoyllysine-residue succinyltransferase	2-oxoglutarate decarboxylation to succinyl-CoA