1. Experiments have been conducted to determine the origin and character of the lipid in thoracic duct lymph of new-born, unsuckled @entity291 . This involved the collection and analysis of intestinal and hepatic lymph from two bile-fistulated and seven non-fistulated animals.2. The output of total esterified @entity844 in intestinal and hepatic lymph in the unfed @entity291 after recovery from the anaesthetic was about 0.6 and 0.025 g/hr, respectively.3. Three lipoprotein fractions were obtained by ultracentrifugation of intestinal lymph samples. These appeared to correspond to very low- (d < 1.005), low- (1.2 > d < 1.005) and high- (d = 1.20) density lipoprotein of human serum. These lipoproteins contained approximately 40%, 50% and 10% respectively of the total lipid.4. Very low-density lipoprotein was not found in blood serum or hepatic lymph and it was evident that very low-density lipoprotein and most of the low-density lipoprotein in intestinal lymph were derived from sources other than the capillary filtrate.5. The output of total esterified @entity844 in intestinal lymph fell steadily during the course of an 11-16 hr period of bile deprivation to values 55% of those in comparable @entity291 without bile fistulae. This was accompanied by a virtual disappearance of very low-density lipoprotein and a decrease in low-density lipoprotein of approximately 50%. These effects could not be attributed to starvation.6. There was a general resemblance in @entity844 composition between biliary lipid and the @entity412 of the lipoproteins, the predominant @entity1718 being 16:0 and 18:1. The presence of appreciable levels of odd @entity505 number and branched-chain @entity1718 were consistent with the transfer of significant amounts of free @entity844 from maternal blood to the foetus.7. It is concluded that most of the lipid in thoracic-duct lymph of unfed, new-born @entity291 is derived from the intestines and that the @entity1718 of the very low-density lipoprotein in intestinal lymph arise from the absorption of biliary phospholipid.

The origin of lipoprotein in the intestinal and hepatic lymph of unsuckled new-born XXXX .

@entity844 :: ('CHEBI:35366', 'Chemical') :: ['fatty-acid', 'fatty acid'] @entity412 :: ('CHEBI:17855', 'Chemical') :: ['triglyceride'] @entity505 :: ('MESH:D002244', 'Chemical') :: ['carbon'] @entity1718 :: ('MESH:D005227', 'Chemical') :: ['fatty acids'] @entity291 :: ('9913', 'Species') :: ['calf', 'calves']
@entity291 :: (9913,Species) :: ['calves']
