Publications de Caroline Seaiby

IR-induced conformational isomerization of a helical peptide in a cold ion trap

Thomas Rizzo, Aleksandra Zabuga, Caroline Seaiby, Annette Svendsen

In this work we use laser-induced population transfer techniques to study the conformational isomerization of a helical peptide, Ac-Phe-(Ala)5-LysH+, in a cold ion trap. In one scheme, called IR-UV hole-filling spectroscopy, a single conformation is select ...

American Institute of Physics2016

Spectroscopic Probes of Conformational Isomerization of Biological Molecules in a Cold Ion Trap

Caroline Seaiby

The function of biologically active molecules depends both on their structure and on their conformational dynamics. In solution, intramolecular interaction with the solvent will influence different biological processes, i.e. protein folding. However second ...

EPFL2011

Spectroscopy and Conformational Preferences of Gas-Phase Helices

Thomas Rizzo, Oleg Boyarkine, Caroline Seaiby

We describe here a study of the spectroscopy of two peptides that we expect to be helical, Ac-Phe-(Ala)5-Lys-H+ and Ac-Phe-(Ala)10-Lys-H+, and one that we expect to be globular, Ac-Lys(H+)-Phe-(Ala)10, with the goal of identifying spectral features charact ...

2009

Conformation-specific spectroscopy and photodissociation of cold, protonated tyrosine and phenylalanine

Thomas Rizzo, Oleg Boyarkine, Monia Guidi, Sébastien Mercier, Caroline Seaiby

We present here ultraviolet and infrared spectra of protonated aromatic amino acids in a cold, 22-pole ion trap. Ultraviolet photofragmentation spectra of protonated tyrosine and phenylalanine show vibronically resolved bands corresponding to different sta ...

2007