Figure 3

Sandwich assays. Left: schematic representation of the sandwich assay with enzymatic label performed on GNRs. Right: kinetics of the enzymatic reactions when GNRs modified with specific antibodies were incubated with a standard solution of CA125 (steepest line), human plasma (second steepest line) or when GNRs conjugated with aspecific antibodies (flattest line) were incubated with the same standard solution of CA125.