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. Author manuscript; available in PMC: 2011 Oct 24.
Published in final edited form as: Biochemistry. 2010 Jul 27;49(29):6290–6295. doi: 10.1021/bi100932p

Figure 6.

Figure 6

Stern-Volmer plots of the quenching of FCN fluorescence of the acetylated GGFCNAA (Ac-GGFCNAA) peptide by imidazole at pH 5 (black) and pH 9 (red). The Stern-Volmer constants are 18.3 M−1 at pH 5 and 39.8 M−1 at pH 9.