title: A PYP chromophore acts as a 'photoacid' in an isolated hydrogen bonded complex.
abstract: The light-induced response of a neutral Photoactive Yellow Protein chromophore in a hydrogen-bonded complex with a proton acceptor has been studied by dual-detection action absorption spectroscopy and density functional theory. We show that the chromophore is a 'photoacid' and that ultrafast excited-state proton transfer might be operative in an isolated complex.
authors.affiliation: Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark. lha@phys.au.dk.
authors.forename: Lars H
authors.initials: LH
authors.lastname: Andersen
authors.forename: Anastasia V
authors.initials: AV
authors.lastname: Bochenkova
authors.forename: Jørgen
authors.initials: J
authors.lastname: Houmøller
authors.forename: Hjalte V
authors.initials: HV
authors.lastname: Kiefer
authors.forename: Elie
authors.initials: E
authors.lastname: Lattouf
authors.forename: Mark H
authors.initials: MH
authors.lastname: Stockett