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Toxicity of Aβ40, Aβ42, and their Ala-substituted analogues. Aβ40, Aβ42, and their respective Lys→Ala analogues were incubated with differentiated PC-12 cells for 48 h, and cell death was measured using the LDH release assay. The results are an average of four to six experiments and are presented as mean ± SEM.
