Development of an Enzyme-Linked Immunosorbent Assay and Gold-Labelled Immunochromatographic Strip Assay for the Detection of Ancient Wool

Figure 6

The limit of detection (LOD) of the ELISA test for keratin: (a) PBS; (b) negative control; (c–k) keratin with different concentrations of 10⁻², 10⁻¹, 1, 10, 10², 10³, 10⁴, 10⁵, and 10⁶ ng/mL.