scholarly journals Reactive Chlorinating Species Produced by Myeloperoxidase Target the Vinyl Ether Bond of Plasmalogens

2001 ◽  
Vol 276 (26) ◽  
pp. 23733-23741 ◽  
Author(s):  
Carolyn J. Albert ◽  
Jan R. Crowley ◽  
Fong-Fu Hsu ◽  
Arun K. Thukkani ◽  
David A. Ford
Keyword(s):  
Vinyl Ether ◽  
Ether Bond ◽  
Reactive Chlorinating Species

Specific Iodination of Vinyl Ether Bond

1969 ◽  
Vol 71 (8) ◽  
pp. 618-621
Author(s):  
C. V. Viswanathan ◽  
S. P. Hoevet ◽  
G. A. Muccini ◽  
W. O. Lundberg
Keyword(s):  
Vinyl Ether ◽  
Ether Bond

scholarly journals Eosinophil Peroxidase-derived Reactive Brominating Species Target the Vinyl Ether Bond of Plasmalogens Generating a Novel Chemoattractant, α-Bromo Fatty Aldehyde

2003 ◽  
Vol 278 (11) ◽  
pp. 8942-8950 ◽  
Author(s):  
Carolyn J. Albert ◽  
Arun K. Thukkani ◽  
Rita M. Heuertz ◽  
Arne Slungaard ◽  
Stanley L. Hazen ◽  
...  
Keyword(s):  
Vinyl Ether ◽  
Fatty Aldehyde ◽  
Ether Bond ◽  
Eosinophil Peroxidase

scholarly journals THE EFFECT OF FIXATION WITH FORMALDEHYDE AND GLUTARALDEHYDE ON THE COMPOSITION OF PHOSPHOLIPIDS EXTRACTABLE FROM RAT HYPOTHALAMUS

1969 ◽  
Vol 17 (7) ◽  
pp. 482-486 ◽  
Author(s):  
R. C. ROOZEMOND
Keyword(s):  
Vinyl Ether ◽  
Free Amino ◽  
Tissue Extract ◽  
Cross Linking ◽  
Hydrolytic Cleavage ◽  
Amino Groups ◽  
Ether Bond ◽  
Rat Hypothalamus ◽  
The Cross

Fixation of rat hypothalamus in 4% formaldehyde + 1% CaCl2 for 24 hr at 0°C reduced the amount of extractable ethanolamine phospholipids considerably. This decrease may be caused by hydrolytic cleavage of the vinyl ether bond in phosphatidalethanolamine and by reaction of formaldehyde with the free amino groups in ethanolamine phospholipids. Evidence is presented that the reaction with free amino groups may be the main cause for the decrease of extractable phospholipids when dealing with a fixative that contains glutaraldehyde and is buffered at pH 7. In this case no phosphatidylserine and hardly any phosphatidylethanolamine could be detected in the tissue extract. It is presumed that these phospholipids are fixed to proteins by the cross-linking action of glutaraldehyde involving free amino groups of proteins and phospholipids.

scholarly journals Reactive Brominating Species Produced by Myeloperoxidase Target the Vinyl Ether Bond of Plasmalogens

2001 ◽  
Vol 277 (7) ◽  
pp. 4694-4703 ◽  
Author(s):  
Carolyn J. Albert ◽  
Jan R. Crowley ◽  
Fong-Fu Hsu ◽  
Arun K. Thukkani ◽  
David A. Ford
Keyword(s):  
Vinyl Ether ◽  
Ether Bond

scholarly journals Purification, Identification, and Cloning of Lysoplasmalogenase, the Enzyme That Catalyzes Hydrolysis of the Vinyl Ether Bond of Lysoplasmalogen

2011 ◽  
Vol 286 (28) ◽  
pp. 24916-24930 ◽  
Author(s):  
Lai-Chu Wu ◽  
Douglas R. Pfeiffer ◽  
Elisabeth A. Calhoon ◽  
Francesca Madiai ◽  
Guido Marcucci ◽  
...  
Keyword(s):  
Vinyl Ether ◽  
Ether Bond ◽  
Hydrolysis Of

A bacterial light response reveals an orphan desaturase for human plasmalogen synthesis

Science ◽  
2019 ◽  
Vol 366 (6461) ◽  
pp. 128-132 ◽  
Author(s):  
Aránzazu Gallego-García ◽  
Antonio J. Monera-Girona ◽  
Elena Pajares-Martínez ◽  
Eva Bastida-Martínez ◽  
Ricardo Pérez-Castaño ◽  
...  
Keyword(s):  
Vinyl Ether ◽  
Desaturase Activity ◽  
Bond Formation ◽  
Myxococcus Xanthus ◽  
Light Response ◽  
Human Cell Line ◽  
Photooxidative Stress ◽  
Ether Bond ◽  
Human Enzyme ◽  
Bacterial Enzyme

Plasmalogens are glycerophospholipids with a hallmark sn-1 vinyl ether bond. These lipids are found in animals and some bacteria and have proposed membrane organization, signaling, and antioxidant roles. We discovered the plasmanylethanolamine desaturase activity that is essential for vinyl ether bond formation in a bacterial enzyme, CarF, which is a homolog of the human enzyme TMEM189. CarF mediates light-induced carotenogenesis in Myxococcus xanthus, and plasmalogens participate in sensing photooxidative stress through singlet oxygen. TMEM189 and other animal homologs could functionally replace CarF in M. xanthus, and knockout of TMEM189 in a human cell line eliminated plasmalogens. Discovery of the human plasmanylethanolamine desaturase will spur further study of plasmalogen biogenesis, functions, and roles in disease.

Thermal gravimetric analysis of in-situ crosslinked nanocellulose whiskers • poly(methyl vinyl ether-co-maleic acid) • polyethylene glycol

TAPPI Journal ◽  
2011 ◽  
Vol 10 (4) ◽  
pp. 29-33
Author(s):  
LEE A. GOETZ ◽  
AJI P. MATHEW ◽  
KRISTIINA OKSMAN ◽  
ARTHUR J. RAGAUSKAS
Keyword(s):  
Thermal Stability ◽  
Polyethylene Glycol ◽  
Vinyl Ether ◽  
Thermal Gravimetric Analysis ◽  
Maleic Acid ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
Methyl Vinyl ◽  
Methyl Vinyl Ether

The thermal stability and decomposition of in-situ crosslinked nanocellulose whiskers – poly(methyl vinyl ether-co-maleic acid) – polyethylene glycol formulations (PMVEMA-PEG), (25%, 50%, and 75% whiskers) – were investigated using thermal gravimetric analysis (TGA) methods. The thermal degradation behavior of the films varied according to the percent cellulose whiskers in each formulation. The presence of cellulose whiskers increased the thermal stability of the PMVEMA-PEG matrix.

Benzyl ethers of methyl α-D-glucopyranoside

1980 ◽  
Vol 45 (7) ◽  
pp. 1959-1963 ◽  
Author(s):  
Dušan Joniak ◽  
Božena Košíková ◽  
Ludmila Kosáková
Keyword(s):  
Kinetic Study ◽  
Spectrophotometric Determination ◽  
Reductive Cleavage ◽  
Ether Bond ◽  
Benzyl Ethers ◽  
Acid Catalyzed ◽  
Model Substances ◽  
Hydrolysis Of

Methyl 4-O-(3-methoxy-4-hydroxybenzyl) and methyl 4-O-(3,5-dimethoxy-4-hydroxybenzyl)-α-D-glucopyranoside and their 6-O-isomers were prepared as model substances for the ether lignin-saccharide bond by reductive cleavage of corresponding 4,6-O-benzylidene derivatives. Kinetic study of acid-catalyzed hydrolysis of the compounds prepared was carried out by spectrophotometric determination of the benzyl alcoholic groups set free, after their reaction with quinonemonochloroimide, and it showed the low stability of the p-hydroxybenzyl ether bond.

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