Unconventional Zwitterionic State of L-Cysteine
Ataman, Evren LU ; Isvoranu, Cristina LU ; Andersen, Jesper N LU ; Schnadt, Joachim LU
and Schulte, Karina
LU
(2011)
In The Journal of Physical Chemistry Letters
2(14).
p.1677-1681
- Abstract
- We report the signature of an unconventional zwitterion in thick (>40 angstrom) L-cysteine films grown at low temperature (100 K) by means of sublimation in ultrahigh vacuum. Using X-ray photoelectron spectroscopy (XPS) we find that protonated amino groups (57%) are less prevalent than in films grown at higher temperatures. A large majority of the protonated amino groups receive the hydrogen through deprotonation of the thiol group (45%) and, in contrast, only a small fraction of the carboxylic groups (13%) is deprotonated. This shows, for the first time, the unconventional zwitterion to be the dominant species in L-cysteine. We believe the unusual growth parameters are responsible for this novel observation.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2072098
- author
- Ataman, Evren
LU
; Isvoranu, Cristina
LU
; Andersen, Jesper N
LU
; Schnadt, Joachim
LU
and Schulte, Karina
LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Letters
- volume
- 2
- issue
- 14
- pages
- 1677 - 1681
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000293191800007
- scopus:79960708588
- ISSN
- 1948-7185
- DOI
- 10.1021/jz2006918
- language
- English
- LU publication?
- yes
- id
- dd48be2a-c788-4622-a5cd-db8e9120d63d (old id 2072098)
- date added to LUP
- 2016-04-01 12:59:27
- date last changed
- 2022-02-23 02:17:21
@article{dd48be2a-c788-4622-a5cd-db8e9120d63d,
abstract = {{We report the signature of an unconventional zwitterion in thick (>40 angstrom) L-cysteine films grown at low temperature (100 K) by means of sublimation in ultrahigh vacuum. Using X-ray photoelectron spectroscopy (XPS) we find that protonated amino groups (57%) are less prevalent than in films grown at higher temperatures. A large majority of the protonated amino groups receive the hydrogen through deprotonation of the thiol group (45%) and, in contrast, only a small fraction of the carboxylic groups (13%) is deprotonated. This shows, for the first time, the unconventional zwitterion to be the dominant species in L-cysteine. We believe the unusual growth parameters are responsible for this novel observation.}},
author = {{Ataman, Evren and Isvoranu, Cristina and Andersen, Jesper N and Schnadt, Joachim and Schulte, Karina}},
issn = {{1948-7185}},
language = {{eng}},
number = {{14}},
pages = {{1677--1681}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Letters}},
title = {{Unconventional Zwitterionic State of L-Cysteine}},
url = {{http://dx.doi.org/10.1021/jz2006918}},
doi = {{10.1021/jz2006918}},
volume = {{2}},
year = {{2011}},
}