The lateral flow immunoassays conducted on buccal cells revealed frataxin protein levels at 50.5% in carriers and 21.1% in Friedreich's ataxia patients.18 The FRDAkd mouse model facilitates an exploration of various frataxin-level profiles across different tissues, mirroring those observed in controls, carriers and Friedreich's ataxia patients. Here, FXN is linked to Friedreich ataxia.