IR spectroscopy of protonated leu-enkephalin and its 18-crown-6 complex embedded in helium droplets.
Phys Chem Chem Phys
; 17(34): 21902-11, 2015 Sep 14.
Article
en En
| MEDLINE
| ID: mdl-26234567
Ultracold IR spectra of the protonated five amino acid peptide leu-enkephalin (Tyr-Gly-Gly-Phe-Leu) embedded in superfluid helium droplets have been recorded using a free-electron laser as radiation source. The results show resolved spectra, which are in good agreement with theoretical calculations, as well as with the available gas-phase data indicating that the helium environment does not induce a significant matrix-shift. In addition, the effect of the interaction between the charge and the peptide backbone has been further investigated by complexing protonated leu-enkephalin with one 18-crown-6 molecule. Good agreement between the experimental and theoretical results allow for an assignment of a preferred molecular structure.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Protones
/
Encefalina Leucina
/
Éteres Corona
/
Helio
Idioma:
En
Revista:
Phys Chem Chem Phys
Asunto de la revista:
BIOFISICA
/
QUIMICA
Año:
2015
Tipo del documento:
Article
País de afiliación:
Alemania