1.21.99.1	beta-cyclopiazonate dehydrogenase	-	
1.21.99.2	cyclic dehypoxanthinyl futalosine synthase	transferred to EC 1.21.98.1	
1.21.99.3	thyroxine 5-deiodinase	-	
1.21.99.4	thyroxine 5'-deiodinase	-	
1.21.99.5	tetrachloroethene reductive dehalogenase	-