Title :
Probing the fastest dynamics in peptide conformational dynamics
Author :
Zinth, W. ; Renner, Christian ; Behrendt, R.
Abstract :
In this study, a suitably functionalized azobenzene molecule, (4-aminophenyl)azobenzoic acid, is incorporated as a fast photo-switch into a backbone-cyclized peptide built up from eight amino-acids. Femtosecond transient absorption spectroscopy with 60 fs excitation pulses (480 nm) and white light probing (generated in CaF2) record the molecular reaction. Femtosecond experiments have been performed on the cyclic peptide and a linear peptide which serves as a reference system where the conformation is not constrained.
Keywords :
bio-optics; high-speed optical techniques; molecular biophysics; molecular configurations; proteins; visible spectra; (4-aminophenyl)azobenzoic acid; 480 nm; 60 fs; CaF2; amino-acids; azobenzene molecule; cyclic peptide; excitation pulses; femtosecond spectroscopy; linear peptide; molecular reaction; peptide conformational dynamics; photoswitch; transient absorption spectroscopy; white light probing; Absorption; Bonding; Delay effects; Geometry; Peptides; Pulse generation; Quantum mechanics; Spectroscopy; Stationary state; Ultrafast electronics;
Conference_Titel :
Quantum Electronics Conference, 2003. EQEC '03. European
Print_ISBN :
0-7803-7733-8
DOI :
10.1109/EQEC.2003.1314027
