Figure 4
From: A Versatile Multiple Target Detection System Based on DNA Nano-assembled Linear FRET Arrays

(a) Schematic representation of simultaneous detection procedures of three specific targets by a three-DNA sequence assembled system; (b–d) fluorescence spectra for three-step FRET detection platform (P1-P2-P3-P4) in the presence of various concentrations of targets. Excitation wavelengths: (b) 364 nm; (c) 457 nm; (d) 520 nm.