Conformation-specific spectroscopy of capped glutamine-containing peptides: role of a single glutamine residue on peptide backbone preferences

2016 ◽  
Vol 18 (16) ◽  
pp. 11306-11322 ◽  
Author(s):  
Patrick S. Walsh ◽  
Jacob C. Dean ◽  
Carl McBurney ◽  
Hyuk Kang ◽  
Samuel H. Gellman ◽  
...  
Keyword(s):  
Gas Phase ◽  
Peptide Backbone ◽  
Glutamine Residue ◽  
Conformational Preferences

The conformational preferences of a series of short, aromatic-capped, glutamine-containing peptides have been studied under jet-cooled conditions in the gas phase.

scholarly journals The role of radiolysis in the modelling of C2H4O2 isomers and dimethyl ether in cold dark clouds

2020 ◽  
Vol 500 (3) ◽  
pp. 3414-3424
Author(s):  
Alec Paulive ◽  
Christopher N Shingledecker ◽  
Eric Herbst
Keyword(s):  
Gas Phase ◽  
Dimethyl Ether ◽  
Recent Observation ◽  
Cosmic Ray ◽  
Thermal Method ◽  
Dark Clouds ◽  
Ice Surface ◽  
Dust Grain ◽  
Complex Organic

ABSTRACT Complex organic molecules (COMs) have been detected in a variety of interstellar sources. The abundances of these COMs in warming sources can be explained by syntheses linked to increasing temperatures and densities, allowing quasi-thermal chemical reactions to occur rapidly enough to produce observable amounts of COMs, both in the gas phase, and upon dust grain ice mantles. The COMs produced on grains then become gaseous as the temperature increases sufficiently to allow their thermal desorption. The recent observation of gaseous COMs in cold sources has not been fully explained by these gas-phase and dust grain production routes. Radiolysis chemistry is a possible non-thermal method of producing COMs in cold dark clouds. This new method greatly increases the modelled abundance of selected COMs upon the ice surface and within the ice mantle due to excitation and ionization events from cosmic ray bombardment. We examine the effect of radiolysis on three C2H4O2 isomers – methyl formate (HCOOCH3), glycolaldehyde (HCOCH2OH), and acetic acid (CH3COOH) – and a chemically similar molecule, dimethyl ether (CH3OCH3), in cold dark clouds. We then compare our modelled gaseous abundances with observed abundances in TMC-1, L1689B, and B1-b.

scholarly journals Role of peptide backbone conformation on biological activity of chemotactic peptides.

1991 ◽  
Vol 266 (28) ◽  
pp. 18460-18468
Author(s):  
A.R. Dentino ◽  
P.A. Raj ◽  
K.K. Bhandary ◽  
M.E. Wilson ◽  
M.J. Levine
Keyword(s):  
Biological Activity ◽  
Peptide Backbone ◽  
Backbone Conformation ◽  
Chemotactic Peptides ◽  
Peptide Backbone Conformation

Spectroscopy and conformational preferences of gas-phase helices

2009 ◽  
Vol 11 (1) ◽  
pp. 125-132 ◽  
Author(s):  
Jaime A. Stearns ◽  
Caroline Seaiby ◽  
Oleg V. Boyarkin ◽  
Thomas R. Rizzo
Keyword(s):  
Gas Phase ◽  
Conformational Preferences

Role of solid- and gas-phase interactions in the coaction of the oxides in MnO2 + PbO and MnO2 + V2O5 compositions activating the thermal oxidation of GaAs

2007 ◽  
Vol 52 (10) ◽  
pp. 1498-1502 ◽  
Author(s):  
V. F. Kostryukov ◽  
V. R. Pshestanchik ◽  
I. A. Donkareva ◽  
B. L. Agapov ◽  
S. I. Lopatin ◽  
...  
Keyword(s):  
Thermal Oxidation ◽  
Gas Phase

Formation of OH radicals in the gas phase ozonolysis of alkenes: the unexpected role of carbonyl oxides

1996 ◽  
Vol 252 (3-4) ◽  
pp. 221-229 ◽  
Author(s):  
Roland Gutbrod ◽  
Ralph N. Schindler ◽  
Elfi Kraka ◽  
Dieter Cremer
Keyword(s):  
Gas Phase ◽  
Oh Radicals ◽  
Carbonyl Oxides
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