1.5.99.8	proline dehydrogenase	transferred to EC 1.5.5.2	
1.5.99.9	methylenetetrahydromethanopterin dehydrogenase	transferred to EC 1.5.98.1	
1.5.99.B2	proline dehydrogenase (acceptor)	preliminary BRENDA-supplied EC number	
1.5.99.B4	flavin-containing opine dehydrogenase	preliminary BRENDA-supplied EC number