This enzyme is the partner of the peroxiredoxin (alkyl hydroperoxide reductase) AhpC which contains the peroxide-reactive cysteine. AhpF contains the reductant (NAD(P)H) binding domain (pfam00070) and presumably acts to resolve the disulfide which forms after oxidation of the active site cysteine in AphC. This proteins contains two paired conserved cysteine motifs, CxxCP and CxHCDGP. [Cellular processes, Detoxification, Cellular processes, Adaptations to atypical conditions]