Impact of the complexing cation on the sensitivity of collision-induced dissociation spectra to fatty acid position for a set of YXY/YYX-type triglycerides

2018 ◽  
Vol 32 (18) ◽  
pp. 1591-1598 ◽  
Author(s):  
Pavel Makarov ◽  
Dong Zheng ◽  
Duc Le ◽  
Jason J. Evans
Keyword(s):  
Fatty Acid ◽  
Collision Induced Dissociation ◽  
Fatty Acid Position

Fatty acid neutral losses observed in tandem mass spectrometry with collision-induced dissociation allows regiochemical assignment of sulfoquinovosyl-diacylglycerols

2013 ◽  
Vol 48 (2) ◽  
pp. 205-215 ◽  
Author(s):  
Rosalia Zianni ◽  
Giuliana Bianco ◽  
Filomena Lelario ◽  
Ilario Losito ◽  
Francesco Palmisano ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acid ◽  
Tandem Mass Spectrometry ◽  
Collision Induced Dissociation ◽  
Tandem Mass

scholarly journals Lipid digestion of oil-in-water emulsions stabilized with low molecular weight surfactants

2019 ◽  
Vol 10 (12) ◽  
pp. 8195-8207
Author(s):  
Natalie Ng ◽  
Peter X. Chen ◽  
Saeed M. Ghazani ◽  
Amanda J. Wright ◽  
Alejandro Marangoni ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Fatty Acid ◽  
Low Molecular Weight ◽  
Lipid Digestion ◽  
Food Emulsions ◽  
Oil In Water ◽  
Glycerol Mono ◽  
Fatty Acid Position

Altering sn-fatty acid position of glycerol mono-oleate (GMO) from sn-1 to sn-2 decreases fatty acid bioaccessibility by 25.9% providing possible strategies to tailor lipemic responses of food emulsions.

scholarly journals Synthesis of non-hydroxy-galactosylceramides and galactosyldiglycerides by hydroxy-ceramide galactosyltransferase

1996 ◽  
Vol 317 (2) ◽  
pp. 589-597 ◽  
Author(s):  
Petra van der BIJL ◽  
Ger J. STROUS ◽  
Matthijs LOPES-CARDOZO ◽  
Jane THOMAS-OATES ◽  
Gerrit van MEER
Keyword(s):  
Fatty Acids ◽  
Endoplasmic Reticulum ◽  
Fatty Acid ◽  
Hydroxy Fatty Acid ◽  
Fast Atom Bombardment ◽  
Chinese Hamster ◽  
Mass Spectrometric ◽  
Collision Induced Dissociation ◽  
Spectrometric Analysis ◽  
Transfected Cells

Galactosylceramide (GalCer) is the major glycolipid in brain. In order to characterize the activity of brain UDPgalactose: ceramide galactosyltransferase (CGalT), it has been stably expressed in CGalT-negative Chinese hamster ovary (CHO) cells. After fractionation of transfected cells, CHO-CGT, on sucrose gradients, the activity resides at the density of endoplasmic reticulum and not of Golgi. A lipid chromatogram from CHO-CGT cells revealed two new iodine-staining spots identified as GalCer, since they comigrate with GalCer standards, can be metabolically labelled with [3H]galactose, are recognized by anti-GalCer antibodies, and are resistant to alkaline hydrolysis. A third [3H]galactose lipid was identified as galactosyldiglyceride. In the homogenate CGalT displays a 25-fold preference for hydroxy fatty acid-containing ceramides. Remarkably, endogenous GalCer of transfected cells contains exclusively non-hydroxy fatty acids: fast atom bombardment and collision-induced dissociation mass spectrometric analysis revealed mainly C16:0 in the lower GalCer band on TLC and mainly C22:0 and C24:0 in the upper band. Our results suggest that CGalT galactosylates both hydroxy- and non-hydroxy fatty acid-containing ceramides and diglycerides, depending on their local availability. Thus, CGalT alone may be responsible for the synthesis of hydroxy- and non-hydroxy-GalCer, and galactosyldiglyceride in myelin.

A strategy for simultaneous determination of fatty acid composition, fatty acid position, and position-specific isotope contents in triacylglycerol matrices by 13C-NMR

2016 ◽  
Vol 409 (1) ◽  
pp. 307-315 ◽  
Author(s):  
Noelle Merchak ◽  
Virginie Silvestre ◽  
Denis Loquet ◽  
Toufic Rizk ◽  
Serge Akoka ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Simultaneous Determination ◽  
Acid Composition ◽  
13C Nmr ◽  
Fatty Acid Position

scholarly journals Fatty Acid Composition by Total Acyl Lipid Collision-Induced Dissociation Time-of-Flight (TAL-CID-TOF) Mass

2021 ◽  
pp. 117-133
Author(s):  
Pamela Tamura ◽  
Carl Fruehan ◽  
David K. Johnson ◽  
Paul Hinkes ◽  
Todd D. Williams ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Time Of Flight ◽  
Collision Induced Dissociation ◽  
Acyl Lipid

Collision-Induced Dissociation of Fatty Acid [M – 2H + Na]– Ions: Charge-Directed Fragmentation and Assignment of Double Bond Position

2014 ◽  
Vol 25 (11) ◽  
pp. 1917-1926 ◽  
Author(s):  
Michael C. Thomas ◽  
Jens Altvater ◽  
Thomas J. Gallagher ◽  
Geoffrey W. Nette
Keyword(s):  
Fatty Acid ◽  
Double Bond ◽  
Double Bond Position ◽  
Collision Induced Dissociation ◽  
Na Ions

Electrospray Ionization and Collision Induced Dissociation Mass Spectrometry of Primary Fatty Acid Amides

2012 ◽  
Vol 84 (5) ◽  
pp. 2388-2394 ◽  
Author(s):  
Erin B. Divito ◽  
Andrew P. Davic ◽  
Mitchell E. Johnson ◽  
Michael Cascio
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acid ◽  
Electrospray Ionization ◽  
Collision Induced Dissociation ◽  
Fatty Acid Amides

Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

1982 ◽  
Vol 40 ◽  
pp. 78-79
Author(s):  
Kenneth H. Downing ◽  
Robert M. Glaeser
Keyword(s):  
Electron Beam ◽  
Fatty Acid ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Structural Damage ◽  
Direct Result ◽  
Second Step ◽  
Strong Temperature Dependence ◽  
Electron Dose ◽  
Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

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