Content of highly unsaturated fatty acids in fish from rivers of contrasting temperature

2018 ◽  
Vol 34 (6) ◽  
pp. 565-574 ◽  
Author(s):  
N.N. Sushchik ◽  
I.V. Zuev ◽  
G.S. Kalachova ◽  
A.V. Ageev ◽  
M.I. Gladyshev
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Highly Unsaturated Fatty Acids

scholarly journals The same rat Δ6-desaturase not only acts on 18- but also on 24-carbon fatty acids in very-long-chain polyunsaturated fatty acid biosynthesis

2002 ◽  
Vol 364 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Sabine D'ANDREA ◽  
Hervé GUILLOU ◽  
Sophie JAN ◽  
Daniel CATHELINE ◽  
Jean-Noël THIBAULT ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acid ◽  
Unsaturated Fatty Acids ◽  
Fatty Acid Biosynthesis ◽  
Chain Polyunsaturated Fatty Acid ◽  
Acid Biosynthesis ◽  
Highly Unsaturated Fatty Acids ◽  
Long Chain ◽  
Δ6 Desaturase

The recently cloned Δ6-desaturase is known to catalyse the first step in very-long-chain polyunsaturated fatty acid biosynthesis, i.e. the desaturation of linoleic and α-linolenic acids. The hypothesis that this enzyme could also catalyse the terminal desaturation step, i.e. the desaturation of 24-carbon highly unsaturated fatty acids, has never been elucidated. To test this hypothesis, the activity of rat Δ6-desaturase expressed in COS-7 cells was investigated. Recombinant Δ6-desaturase expression was analysed by Western blot, revealing a single band at 45kDa. The putative involvement of this enzyme in the Δ6-desaturation of C24:5n-3 to C24:6n-3 was measured by incubating transfected cells with C22:5n-3. Whereas both transfected and non-transfected COS-7 cells were able to synthesize C24:5n-3 by elongation of C22:5n-3, only cells expressing Δ6-desaturase were also able to produce C24:6n-3. In addition, Δ6-desaturation of [1-14C]C24:5n-3 was assayed invitro in homogenates from COS-7 cells expressing Δ6-desaturase or not, showing that Δ6-desaturase catalyses the conversion of C24:5n-3 to C24:6n-3. Evidence is therefore presented that the same rat Δ6-desaturase catalyses not only the conversion of C18:3n-3 to C18:4n-3, but also the conversion of C24:5n-3 to C24:6n-3. A similar mechanism in the n-6 series is strongly suggested.

scholarly journals Interactions of L-Ascorbyl-2-Phosphate-Mg and n-3 Highly Unsaturated Fatty Acids on Japanese Flounder Juveniles

1995 ◽  
Vol 61 (5) ◽  
pp. 860-866 ◽  
Author(s):  
Pairat Kosutarak ◽  
Akio Kanazawa ◽  
Shin-ichi Teshima ◽  
Shunsuke Koshio
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Japanese Flounder ◽  
Highly Unsaturated Fatty Acids
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