The nature of Covalently bound fatty acids in wool fibres

1991 ◽  
Vol 42 (8) ◽  
pp. 1285 ◽  
Author(s):  
AP Negri ◽  
HJ Cornell ◽  
DE Rivett
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Major Fatty Acid ◽  
Wool Fibre ◽  
Fatty Acid Component ◽  
Alcoholic Alkali ◽  
Acid Component ◽  
Alkali Solutions ◽  
Ester Linkage ◽  
Covalently Bound

The wool fibre contains a fatty acid component which can only be liberated from the fibre by treatment with alcoholic alkali solutions. The major fatty acid from this component has been isolated in quantity and purified. Using GC/MS and NMR, the fatty acid was identified as 18-methyleicosanoic acid. The results obtained from transesterification experiments suggest that the fatty acid is covalently bound to the fibre protein by an ester linkage.

Cell wall lipopolysaccharides from Neisseria catarrhalis

1969 ◽  
Vol 15 (4) ◽  
pp. 365-374 ◽  
Author(s):  
G. A. Adams ◽  
T. G. Tornabene ◽  
M. Yaguchi
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Lipid A ◽  
Soluble Fraction ◽  
Insoluble Fraction ◽  
Major Fatty Acid ◽  
Gram Negative Bacteria ◽  
Acetyl Phosphate ◽  
Fatty Acid Component ◽  
Acid Component

Lipopolysaccharides (LPS) prepared from N. catarrhalis cells were separated into a chloroform-soluble fraction (26%) and a chloroform-insoluble fraction (74%). Both LPS fractions contained D-glucose, D-galactose, D-glucosamine, galactosamine, lipid A, ethanolamine, fatty acids, acetyl, phosphate, and protein in approximately equal proportions. The lipid A moieties prepared from the two LPS fractions were also similar in composition to each other. The fatty acids and galactosamine of the LPS fractions were recovered quantitatively in their lipid A fractions. The major fatty acid component was β-hydroxylauric acid in contrast with β-hydroxymyristic acid, which is the major fatty acid component of the lipid A of N. perflava and other Gram-negative bacteria. The lipid A of N. catarrhalis also contained a considerable amount of D-glucose and D-galactose, which are not normal constituents of lipid A fractions. The presence of amino acids (ca. 2%) in all fractions suggested that proteins were an integral part of the LPS molecules. The absence of heptose and 3-deoxyoctulosonic acid (KDO) from the N. catarrhalis LPS shows that it lacks a lipopolysaccharide "core" structure similar to that present in the LPS of N. perflava; the polysaccharide part of the LPS molecule is also compositionally different from that of N. perflava. These differences may provide additional evidence to that already accumulated from other sources that N. catarrhalis is taxonomically a "false neisseria".

Dihydrosterculic acid, a major fatty acid component ofEuphoria longana seed oil

Lipids ◽  
1969 ◽  
Vol 4 (5) ◽  
pp. 317-320 ◽  
Author(s):  
R. Kleiman ◽  
F. R. Earle ◽  
I. A. Wolff
Keyword(s):  
Fatty Acid ◽  
Seed Oil ◽  
Major Fatty Acid ◽  
Fatty Acid Component ◽  
Acid Component ◽  
Dihydrosterculic Acid

scholarly journals An Unusual Major Fatty Acid Component in Human Depot Fat

Nature ◽  
1961 ◽  
Vol 192 (4799) ◽  
pp. 265-265 ◽  
Author(s):  
D. S. McLAREN ◽  
W. W. C. READ
Keyword(s):  
Fatty Acid ◽  
Major Fatty Acid ◽  
Fatty Acid Component ◽  
Acid Component

The biochemical composition of fin whale blubber

1984 ◽  
Vol 62 (12) ◽  
pp. 2553-2562 ◽  
Author(s):  
C. H. Lockyer ◽  
L. C. McConnell ◽  
T. D. Waters
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Energy Storage ◽  
Free Fatty Acid ◽  
Monounsaturated Fatty Acids ◽  
High Free Fatty Acid ◽  
Fatty Acid Component ◽  
Fin Whale ◽  
Acid Component ◽  
Wet Weight

Fin whale blubber is a heterogenous tissue containing 8.9–77.4% lipid, 3.1–33.8% protein, and 0.07–0.73% ash by wet weight. The blubber may be subdivided into three macroscopically distinct zones. The outermost zones contain up to twice the lipid content of the innermost zone adjacent to the muscle, which contains more protein. Anterior ventral blubber contains less lipid, more protein (of which 50% is collagen), and more ash than posterior dorsal blubber. Foetal blubber contains 1.2% lipid, 10.6% protein, and 0.93% ash by wet weight. Blubber lipid contains ca. 60% triacylglycerol and ca. 25–30% free fatty acid, compared with ca. 25% triacylglycerol and ca. 10% free fatty acid in foetal blubber lipid, which also contains ca. 40% phospholipid. The high free fatty acid component is certainly partly due to postmortem hydrolysis in samples analysed. Monounsaturated fatty acids comprise ca. 60% of blubber lipid; 16:0, 16:1, 18:1, 20:1, 22:1, and 22:6 predominate, similar to the dietary intake. The predominant fatty acids in the outermost and the innermost blubber zones are 22:1 and 16:0, respectively. This may have significance in energy storage and catabolic breakdown.

scholarly journals Effects of Intake of Fish Rich in n-3 Polyunsaturated Fatty Acid on Serum Lipids, Serum Fatty Acid Component and Hemostatic Factors.

2000 ◽  
Vol 53 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Utako Umemura ◽  
Mako Ishimori ◽  
Sayuri Watanabe ◽  
Hiroyasu Iso ◽  
Takashi Shimamoto ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Polyunsaturated Fatty Acid ◽  
Serum Lipids ◽  
Fatty Acid Component ◽  
Serum Fatty Acid ◽  
Acid Component ◽  
Hemostatic Factors

Ceramid-1-phosphoethanolamine aus Myxococcus stipitatus/ Ceramide-1-phosphoethanolamines from Myxococcus stipitatus

1988 ◽  
Vol 43 (8) ◽  
pp. 1063-1068 ◽  
Author(s):  
J. Stein ◽  
H. Budzikiewicz
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Component ◽  
Acid Component ◽  
Chain Base ◽  
Long Chain Base ◽  
Ceramide 1 ◽  
Long Chain

AbstractThe structures of six ceramide-1-phosphoethanolamines have been elucidated which differ in the long chain base as well as in the fatty acid component

Characterization of a Euphorbia lagascae epoxide hydrolase gene that is induced early during germination

2000 ◽  
Vol 28 (6) ◽  
pp. 855-856 ◽  
Author(s):  
J. Edqvist ◽  
I. Farbos
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Epoxide Hydrolase ◽  
Vernolic Acid ◽  
Major Fatty Acid ◽  
Transcription Pattern ◽  
Vicinal Diols ◽  
Hydrolysis Of

In Euphorbia lagascae the major fatty acid in triacylglycerol is the epoxidated fatty acid vernolic acid (cis- 12-epoxyoctadeca-cis-9-enoic acid). The enzymic reactions occurring during the catabolism of epoxidated fatty acids during germination are not known, but it seems likely that the degradation requires the activity of an epoxide hydrolase. Epoxide hydrolases are a group of functionally related enzymes that catalyse the cofactor-independent hydrolysis of epoxides to their corresponding vicinal diols by the addition of a water molecule. Here we report the cloning and characterization of an epoxide hydrolase gene from E. lagascae. The structure of the gene is unusual since it lacks introns. A detailed investigation of the transcription pattern of the epoxide hydrolase gene shows that the gene is induced during germination. We have used in situ hybridization to identify in which tissues the gene is expressed during germination. We speculate that this epoxide hydrolase enzyme is involved in the catabolism of epoxidated fatty acids during germination of E. lagascae seeds.

scholarly journals Oil yield and fatty acid profile of seeds of three Salvia species. A comparative study

2015 ◽  
Vol 61 (2) ◽  
pp. 14-29 ◽  
Author(s):  
Mouna Ben Farhat ◽  
Rym Chaouch -Hamada ◽  
Ahmed Landoulsi
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acids ◽  
Comparative Study ◽  
Seed Oil ◽  
Unsaturated Fatty Acids ◽  
Fatty Acid Content ◽  
Fatty Acid Analysis ◽  
Major Fatty Acid ◽  
Oil Yield

Summary A comparative study of the oil yield and fatty acid composition of three Salvia species seeds collected in different locations has been conducted. Seed oil extraction was made using a Soxhlet-extractor and fatty acid analysis was undertaken using a GC-FID. The effect of the collecting site on oil yield, as well as the content of individual fatty acid and total fatty acid and fatty acid content was significant. Seed oil yield varied from 14.94 to 22.83% and the total fatty acids ranged from 67.36 to 82.49 mg/g DW. α-Linolenic (24.02-49.19%), linoleic (20.13-42.88%), oleic (12.97-17.81%) and palmitic (8.37-16.63%) acids were the most abundant fatty acids in all analyzed samples. α-Linolenic acid was found to be the major fatty acid in S. verbenaca and S. officinalis species, however, S. aegyptiaca was characterized by the prevalence of linoleic acid. Among the unsaturated fatty acids, which were represented in all samples in high amounts (78.16-89.34%), the polyunsaturated fatty acids (α-linolenic and linoleic acids) showed important levels ranging from 63.09 to 74.71%. Seeds of S. verbenaca were the richest in polyunsaturated fatty acids.

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