Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of the effects of a protonated and deprotonated His side-chain on FCN fluorescence measured for the GGFCNXA peptides with an acetylated (blocked) N-terminus. Black, X=Ala at pH 5; red X=His at pH 5; blue, X=His at pH 10. All spectra were recorded in water at the indicated pH. Sample concentration was 20 uM and the excitation was at 240 nm.
