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. 2005 Aug 17;127(32):11214-5.
doi: 10.1021/ja0520520.

Excited-state structure determination of the green fluorescent protein chromophore

Anwar Usman  1 , Omar F Mohammed, Erik T J Nibbering, Jian Dong, Kyril M Solntsev, Laren M Tolbert
Affiliations

Excited-state structure determination of the green fluorescent protein chromophore

Anwar Usman et al. J Am Chem Soc. .

Abstract

Ultrafast polarization-sensitive infrared (IR) spectroscopy of the C=O stretching mode of the chromophore of the green fluorescent protein reveals a near complete twisting around the ethylenic bridge between the phenolate and imidazolidinone groups upon electronic excitation, hinting at a decisive role of this motion in the efficient internal conversion process.

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