Figure 5

Confirmation of SS integrity. (A) Relative fluorescence levels of the GNP-SS-Cypate for the GNP size of 3.7, 8.0, and 16.4 nm. With 3.7 and 8 nm GNPs, the fluorescence is quenched significantly. For 16.4 nm, the fluorescence is enhanced, instead. (B) Fluorescence of 8.0 nm GNP-SS-Cypate before and 5 minutes after adding uPA. Fluorescence is restored as uPA cleaves SS.