Aβ17-40 is less susceptible to manufacturer-dependent effects than full length Aβ. Mean Ca2+ peak responses of FPR-transfected HEK293T cells to 5 μM of Aβ17-40 from three different manufacturers. Clear bars, Aβ17-40 from Anaspec. Striped bars, Aβ17-40 from Synpeptide. Dotted bars: Aβ17-40 from Sigma-Aldrich, n=3, N=1. All Error bars, S.D.; One-way ANOVA test, Dunnett post hoc test; ∗, p ≤ 0.05; ns, no significance.