The positional distributions of fatty acids in the triacylglycerols and phosphatidylcholines of the intestinal and popliteal lymph and plasma of sheep |
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Authors: | W W Christie R A Clegg D T Calvert R C Noble |
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Affiliation: | (1) Hannah Research Institute, KA6 5HL Ayr, Scotland |
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Abstract: | As part of a study of the contribution of the intestinal lymph lipoproteins and their lipid constituents to the plasma lipids
in sheep, the positional distributions of the fatty acids in the triacyl-sn-glycerols and phosphatidylcholines in very low density/low density lipoprotein and high-density lipoprotein fractions were
determined by stereospecific analysis procedures. The triacyl-sn-glycerols of these lipoprotein fractions in intestinal lymph did not differ appreciably in structure and resembled the plasma
triacyl-sn-glycerols in the composition of positionsn-2 especially. However, there were appreciable amounts of the essential fatty acid, linoleic acid, in positionssn-1 andsn-3 of the triacylglycerols in lymph but not in plasma. This result is discussed in terms of the metabolism of the triacylglycerols
of lymph after they enter the plasma as part of a mechanism for the conservation of essential fatty acids in ruminants. No
differences of metabolic note were observed in the structures of the phosphatidylcholines between lipoprotein fractions and
among tissues. |
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