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. Author manuscript; available in PMC: 2015 Aug 4.
Published in final edited form as: Chem Commun (Camb). 2014 Aug 4;50(60):8219–8222. doi: 10.1039/c4cc03527e

Figure 1.

Figure 1

Mechanism of signal transduction in generic aldehyde-bearing amino thiol probes. (a) PET-based fluorescence quenching following reaction of Cys/Hcy with the aldehyde group. (b) PET inhibition through hydrogen bonding between the amine-containing heterocycle and adjacent groups. (c) PET inhibition through protonation of the amine-containing heterocycle.