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Altered morphology of frataxin mutated clones. Morphology of one normal human frataxin clone (hFXN-1D12), one G130V mutated clone (hFXNG130V-G4) and two I154F mutated clones (hFXNI154F-1D3 and hFXNI154F-2C1) were studied by phase contrast microscopy after crystal violet staining. The scale represents 50 µm in A and 25 µm in B. n, normally spread fibroblast; ls, less spread cell; r, rounded cell; ss, spindle-shaped cell; s, senescent cell.Copyright Calmels et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.