Optical absorption of a green fluorescent protein variant: environment effects in a density functional study.

Abstract excerpt

We present an ab initio study of the optical absorption properties of a particularly interesting fluorescent protein (E2GFP), whose complex photophysics still escapes elucidation. In particular, we focus on the role of the protein environment, showing that the effects of both nearby residues and the external field due to residues not accounted for explicitly are needed to properly reproduce the experimental data....

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