Gas-phase hydrogen/deuterium exchange as a molecular probe for the interaction of methanol and protonated peptides.
J Am Soc Mass Spectrom
; 5(7): 623-31, 1994 Jul.
Article
en En
| MEDLINE
| ID: mdl-24221964
ABSTRACT
The gas-phase hydrogen/deuterium (HID) exchange kinetics of several protonated amino acids and dipeptides under a background pressure of CH3OD were determined in an external source Fourier transform mass spectrometer. H/D exchange reactions occur even when the gas-phase basicity of the compound is significantly larger (> 20 kcal/mol) than methanol. In addition; greater deuterium incorporation is observed for compounds that have multiple sites of similar basicities. A mechanism is proposed that involves a structurally specific intermediate with extensive interaction between the protonated compound and methanol.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Am Soc Mass Spectrom
Año:
1994
Tipo del documento:
Article
País de afiliación:
Canadá