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Dilution linearity of the plasma and serum samples using the TDP-43 assay. Panel (A) and (B) illustrate the dilution linearity assessment in plasma and serum, respectively. A linear relationship between dilution factors and TDP-43 concentration was observed both in plasma and serum, with the assay maintaining a stable measurement of TDP-43 even at dilutions up to 64-fold. Error bars (+/− SD) are shown for each sample.
