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Western-blot on aspase-3 protein expression. PC12 cell with normal medium (lane 1), PC12 cell with normal medium and 20 μmol l−1 Aβ (lane 2), PC12 cell with 20% control serum and 20 mol l−1 Aβ (lane 3) and PC12 cell with 20% prepared serum and 20 μmol l−1 Aβ (lane 4).
