Fluorescence spectroscopy
The fluorescence spectra were recorded at 250C on a
Cary Eclipse, Varian Spectrofluorimeter. Typically, 1.0 –
2.0 μM protein in 10 mM Tris-HCl, pH 7.5 was used
and the fluorescence emission spectra were recorded
from 300 nm to 400 nm upon excitation at 295 nm. The
excitation and emission slit widths were kept at 2 nm
and 5 nm respectively. The fluorescence spectra were
normalized and corrected for buffer contributions