PT2; Slc7a12), fibroblast (Col1a1), and myofibroblast (Acta2) of FA mice but not in podocytes (Nphs2), distal convoluted tubules (Slc12a3), intercalated cells of the collecting duct (Atp6v1g3), or principal cells (Aqp2). This evidence concerns the gene SLC12A3 and Friedreich ataxia.