Abstract
The fluorescence spectra and fluorescence lifetimes due to tryptophan residues in HbA, Hb Chesapeake, NES-des-Arg Hb and Hb Kempsey were determined at room temperature. The fluorescence intensity and apparent fluorescence lifetimes decrease when the deoxy or T structure in HbA changes to the oxy or R structure, while no significant difference was observed in Hb Kempsey. The difference of fluorescence behavior was ascribed to the quaternary conformational transition of T- and R-states.
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