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Molecular weight distributions of milk fat triglycerides from seven species.
Abstract: The triglyceride compositions of the milk fats of man, dog, guinea pig, cow, sheep, goat, and horse were compared by gas-liquid chromatography of the intact triglycerides and of the butyl esters of the component fatty acids. The milk fats of man, dog, and guinea pig, which were largely made up of long-chain fatty acids, showed a common pattern with major contributions made by the glycerides with 48-54 acyl carbon atoms. The milk fats of cow, sheep, and goat, which were rich in short-chain acids, showed significant proportions of triglycerides with 28-54 acyl carbon atoms. Horse milk, which contains large amounts of medium-chain fatty acids, gave a characteristic triglyceride pattern in the 26-54 carbon atoms range. The experimentally determined distributions of the molecular weights of the triglycerides of all milk fats deviated significantly from the distributions predicted by random association of the fatty acids from a single pool. The data suggest that in all species the milk fat may be formed by a partial resynthesis of preformed glycerides.
Publication Date: 1967-09-01 PubMed ID: 6049672 The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
Summary
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This research compared the molecular weight distributions of triglycerides (a type of fat) in the milk of seven different species including humans, dogs, guinea pigs, cows, sheep, goats, and horses. The findings indicate that the sources and composition of milk fats differ among species, suggesting that they might be partially formed by a resynthesis of preformed glycerides.
Study Methods
- The researchers compared the triglyceride compositions of milk fats from man, dog, guinea pig, cow, sheep, goat, and horse.
- The comparison was done through the use of gas-liquid chromatography, a method that helps identify and quantify the substances in a mixture.
- This was performed on the intact triglycerides themselves and on the butyl esters of the component fatty acids, a derivative of the fatty acids.
Results and Finding
- The milk fats of man, dog, and guinea pig were largely made up of long-chain fatty acids and showed a common pattern with the glycerides having major contributions from 48-54 acyl carbon atoms.
- The milk fats of cow, sheep, and goat, rich in short-chain acids, demonstrated significant proportions of triglycerides having 28-54 acyl carbon atoms.
- Horse milk, which holds high concentrations of medium-chain fatty acids, produced a distinctive triglyceride pattern in the 26-54 carbon atom range.
- The experimentally determined distributions of the molecular weights of the triglycerides of all milk fats differed significantly from what would be expected if the fatty acids associated at random from a single pool.
Conclusion
- The data from the study suggest that the milk fat in all the species may be partially formed by a process of resynthesis from preformed glycerides.
- This implies that the formation of milk fats is not simply a random process, but instead may involve a level of organization and process that varies across species.
Cite This Article
APA
Breckenridge WC, Kuksis A.
(1967).
Molecular weight distributions of milk fat triglycerides from seven species.
J Lipid Res, 8(5), 473-478.
Publication
Researcher Affiliations
MeSH Terms
- Animals
- Cattle
- Chromatography, Gas
- Chromatography, Thin Layer
- Dietary Fats / analysis
- Dogs
- Fatty Acids / analysis
- Food Analysis
- Goats
- Guinea Pigs
- Horses
- Humans
- Milk / chemistry
- Milk, Human / chemistry
- Molecular Weight
- Sheep
- Triglycerides / analysis
Citations
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