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. Author manuscript; available in PMC: 2013 Nov 6.
Published in final edited form as: Anal Chem. 2012 Oct 29;84(21):9379–9387. doi: 10.1021/ac302165h

Figure 1.

Figure 1

Real-time hybridization of single DNA spot with dyes on opposite ends of the probe-target duplex. A) Schematic representation of the duplex: 5’-Cy3-oligo1-probe with 5’-Cy5-oligo2-target; images of DNA spot with merged Cy3 and Cy5 emission intensity at various time points. B) Images of spots in Cy3 or Cy5 or both filter channels during real-time imaging of single array spots before (t=0) and after (t=90 min) hybridization. C) Real-time hybridization of Cy3/Cy5 fluorescence intensity changes in single spots versus time. Duplex formation kinetics under this unstirred transport-limited regime follows pseudo-first order kinetics (see supplementary information and Figure S-7).

Note: microscopy image contrast has been digitally enhanced for the figures to better facilitate direct observation of the optical changes observed over time in situ.