FXN and Friedreich ataxia: Redox homeostasis is significantly altered in Friedreich’s Ataxia (FRDA; OMIM #229300), an inherited neurodegenerative disease caused by GAA repeat expansion within the first intron of the FXN gene coding for the mitochondrial protein frataxin (Fxn) (Keita et al., 2022; Krasilnikova et al., 2023).