<Tr> <Td> 3DMet </Td> <Td> B04792 </Td> </Tr> <Tr> <Td> Beilstein Reference </Td> <Td> 1208946 </Td> </Tr> <Tr> <Td> ChEBI </Td> <Td> <Ul> <Li> CHEBI: 16238 </Li> </Ul> </Td> </Tr> <Ul> <Li> CHEBI: 16238 </Li> </Ul>

What is the functional difference between fad and nad