| A [auth X] | PF00070 | Pyridine nucleotide-disulphide oxidoreductase (Pyr_redox) | Pyridine nucleotide-disulphide oxidoreductase | This entry represents the N-terminal domain in putative Pyridine nucleotide-disulphide oxidoreductase N-terminal domain-containing proteins and proteins that contain NADH binding domains. | Domain |
| A [auth X] | PF00890 | FAD binding domain (FAD_binding_2) | FAD binding domain | This family includes members that bind FAD. This family includes the flavoprotein subunits from succinate and fumarate dehydrogenase, aspartate oxidase and the alpha subunit of adenylylsulphate reductase. | Domain |
| A [auth X] | PF02852 | Pyridine nucleotide-disulphide oxidoreductase, dimerisation domain (Pyr_redox_dim) | Pyridine nucleotide-disulphide oxidoreductase, dimerisation domain | This family includes both class I and class II oxidoreductases and also NADH oxidases and peroxidases. | Domain |