Dissociation lifetime studies of doubly deprotonated angiotensin peptides

Dissociation lifetime studies of doubly deprotonated angiotensin peptides

The doubly deprotonated [Asn,Val5] angiopeptide, in the gas phase, was irradiated with 266 nm photons. The time of flight (TOF) of the products formed following photoabsorption, namely, the monoanion and neutral fragments, was recorded with submicrosecond time resolution. Monte Carlo simulations of...

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Veröffentlicht in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2009-01, Vol.79 (1 Pt 1), p.011908-011908, Article 011908
Hauptverfasser: Aravind, G, Lammich, L, Andersen, L H
Format: Artikel
Sprache:eng
Schlagworte:
Absorption
Amino Acid Sequence
Angiotensins - chemistry
Carbon Dioxide - chemistry
Monte Carlo Method
Photolysis
Protons
Time Factors
Ultraviolet Rays
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container_title Physical review. E, Statistical, nonlinear, and soft matter physics
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creator Aravind, G
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description The doubly deprotonated [Asn,Val5] angiopeptide, in the gas phase, was irradiated with 266 nm photons. The time of flight (TOF) of the products formed following photoabsorption, namely, the monoanion and neutral fragments, was recorded with submicrosecond time resolution. Monte Carlo simulations of the TOF of the neutral fragments indicate that the dissociation occurs faster than 100 ns. A similar experiment performed on the Val5 angiopeptide also yielded a dissociation time shorter than 100 ns. We suggest dissociation mechanisms that account for the different number of photons required for the release of CO2.
doi_str_mv 10.1103/PhysRevE.79.011908
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source MEDLINE; American Physical Society Journals
subjects Absorption
Amino Acid Sequence
Angiotensins - chemistry
Carbon Dioxide - chemistry
Monte Carlo Method
Photolysis
Protons
Time Factors
Ultraviolet Rays
title Dissociation lifetime studies of doubly deprotonated angiotensin peptides
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