Chain length mismatch and packing constraints of free fatty acids in a hexagonal detergent host phase. A wide line deuterium NMR study

1995 ◽  
Vol 77 (2) ◽  
pp. 203-215 ◽  
Author(s):  
Dörte Otten ◽  
Klaus Beyer
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Chain Length ◽  
Deuterium Nmr ◽  
Nmr Study ◽  
Wide Line

Effect of glycosphingolipid fatty acid chain length on behavior in unsaturated phosphatidylcholine bilayers: A deuterium NMR study

Biochemistry ◽  
1993 ◽  
Vol 32 (1) ◽  
pp. 290-297 ◽  
Author(s):  
Dalian Lu ◽  
Dev Singh ◽  
Michael R. Morrow ◽  
Chris W. M. Grant
Keyword(s):  
Fatty Acid ◽  
Chain Length ◽  
Deuterium Nmr ◽  
Fatty Acid Chain Length ◽  
Fatty Acid Chain ◽  
Nmr Study

Free fatty acids chain length distribution affects the permeability of skin lipid model membranes

2016 ◽  
Vol 1858 (9) ◽  
pp. 2050-2059 ◽  
Author(s):  
Masayuki Uchiyama ◽  
Masashi Oguri ◽  
Enamul H. Mojumdar ◽  
Gert S. Gooris ◽  
Joke A. Bouwstra
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Chain Length ◽  
Length Distribution ◽  
Model Membranes ◽  
Skin Lipid ◽  
Chain Length Distribution

Relation of fatty acid structure to release and esterification of free fatty acids

1963 ◽  
Vol 205 (5) ◽  
pp. 909-912 ◽  
Author(s):  
C. H. Hollenberg ◽  
A. Angel
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Free Fatty Acids ◽  
Chain Length ◽  
Binding Sites ◽  
Free Acid ◽  
Aqueous Solubility ◽  
Subsequent Exposure ◽  
Rat Adipose Tissue ◽  
Acid Structure

After incubation of rat adipose tissue with corticotrophin in buffer-albumin, the composition of the free fatty acids (FFA) in the tissue and in the medium was determined; the medium contained proportionately more myristic, palmitoleic, linoleic, and linolenic acids. The ratio of the amount of each free acid in the medium to that in the tissue increased with decreasing chain length and increasing unsaturation. Free acids produced in adipose tissue by corticotrophin stimulation were esterified by subsequent exposure of the tissue to glucose and insulin. Among the saturated and monoenoic acids the shorter chain components were esterified to a greater extent, while at a given chain length the more unsaturated acids were more readily esterified. Thus the more polar FFA were more readily released from and esterified in adipose tissue. These results could have been produced by a variety of processes including differences between the acids in aqueous solubility or the presence of tissue-binding sites with varying affinities for the different acids.

Changes in enzymatic activities involved in glucose metabolism by acyl-CoAs in Trypanosoma cruzi

2001 ◽  
Vol 47 (1) ◽  
pp. 49-54 ◽  
Author(s):  
M García de Lema ◽  
G Lucchesi ◽  
G Racagni ◽  
E E Machado-Domenech
Keyword(s):  
Fatty Acids ◽  
Glucose Metabolism ◽  
Trypanosoma Cruzi ◽  
Free Fatty Acids ◽  
Chain Length ◽  
Acid Concentration ◽  
Enzymatic Activities ◽  
Coa Thioesters ◽  
Glucose 6 Phosphate Dehydrogenase

This study describes the effect of some saturated and unsaturated free fatty acids and acyl-CoA thioesters on Trypanosoma cruzi glucose 6-phosphate dehydrogenase and hexokinase activities. Glucose 6-phosphate dehydrogenase was sensitive to the destabilizing effect provoked by free fatty acids, while hexokinase remained unaltered. Glucose 6-phosphate dehydrogenase inhibition by free fatty acids was dependent on acid concentration and chain length. Both enzymes were inhibited when they were incubated with acyl-CoA thioesters. The acyl-CoA thioesters inhibited glucose 6-phosphate dehydrogenase at a lower concentration than the free fatty acids; the ligands glucose 6-phosphate and NADP+ afforded protection. The inhibition of hexokinase by acyl-CoAs was not reverted when the enzyme was incubated with ATP. The type of inhibition found with acyl-CoAs in relation to glucose 6-phosphate dehydrogenase and hexokinase suggests that this type inhibition may produce an in vivo modulation of these enzymatic activities.Key words: Trypanosoma cruzi, fatty acids, acyl-CoAs, glucose 6-phosphate dehydrogenase, hexokinase.

Deuterium NMR study of chain disorder in lamellar phases of mixed chain length

1985 ◽  
Vol 89 (21) ◽  
pp. 4535-4540 ◽  
Author(s):  
W. W. S. Tang ◽  
E. E. Burnell ◽  
T. P. Higgs
Keyword(s):  
Chain Length ◽  
Deuterium Nmr ◽  
Lamellar Phases ◽  
Nmr Study

Gefiederlipide der Ringeltaube Columba palumbus / Plumage Lipids from the Ring Dove (Columba palumbus)

1975 ◽  
Vol 30 (5-6) ◽  
pp. 363-368 ◽  
Author(s):  
Jürgen Jacob ◽  
Gernot Grimmer
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Chain Length ◽  
Gland Secretion ◽  
Uropygial Gland ◽  
Ring Dove ◽  
Uropygial Gland Secretion

Abstract Ring Only 6.7% of the whole plumage lipids of the ring dove originates from diester waxes of the uropygial gland secretion. The rest is distributed to hydrocarbons (3.3%), sterolesters and waxes (10.7%), free alcohols and sterols (5%), free fatty acids (55.6%), and unidentified material (18.7%). Among the hydrocarbons saturated odd-numbered, unbranched individuals predominate, but moreover 7-methylalkanes have been detected. The chain length of free and esterified alcohols cor­ responds to those of fatty acids where even-numbered compounds predominate. Main alcoholic component, however, is cholestanol. The origin of these lipids is discussed.

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