a MPP+-induced calcium increase, measured by fura-2, was not prevented by KU-55933 (10 μM). b Representative Western-blot analysis (from four different Western blots) of α-spectrin degradation products SBPD 150/145, as an indicator of calpain, and SBDP120, as an indicator of caspase-3 activity, in CGC treated with MPP+ 200 μM, for 24 h