Fig. 1
From: Validation of an equine serum amyloid A assay with an unusually broad working range
Linearity under dilution of an equine serum pool with high concentration of serum amyloid A (SAA). Determinations were performed by means of an immunotubidometric assay developed for determination of SAA concentrations in horses (VET-SAA). Panel a shows linearity under dilution in the full concentrations range, panel b shows linearity under dilution in the most frequently encountered/relevant concentration range (0–3000 mg/L). While the assay showed slight signs of inaccuracy in the full concentration range (a, Table 2), no significant deviation from a slope equal to 1 and a y-intercept equal to 0 were observed in the linear regression equation (x = the expected level according to dilution, y = the observed concentration) in the 0 to approximately 3000 mg/L concentration range (b, Table 2)