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26 April 2024

» arxiv » physics/0102059

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The coherent dynamics of photoexcited green fluorescent proteins
Riccardo A. G. Cinelli ; Valentina Tozzini ; Vittorio Pellegrini ; Fabio Beltram ; Giulio Cerullo ; Margherita Zavelani-Rossi ; Sandro De Silvestri ; Mudit Tyagi ; Mauro Giacca ;
Date:	20 Feb 2001
Subject:	Biological Physics \| physics.bio-ph q-bio
Abstract:	The coherent dynamics of vibronic wave packets in the green fluorescent protein is reported. At room temperature the non-stationary dynamics following impulsive photoexcitation displays an oscillating optical transmissivity pattern with components at 67 fs (497 cm-1) and 59 fs (593 cm-1). Our results are complemented by ab initio calculations of the vibrational spectrum of the chromophore. This analysis shows the interplay between the dynamics of the aminoacidic structure and the electronic excitation in the primary optical events of green fluorescent proteins.
Source:	arXiv, physics/0102059
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