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Stereospecific distribution of fatty acids in bovine milk fat triglycerides

Published online by Cambridge University Press:  01 June 2009

Peter W. Parodi
Peter W. Parodi
Affiliation:
Fats Research Laboratory, The Butter Marketing Board, Hamilton Central, Queensland, Australia, 4007
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Summary

Pancreatic lipase deacylation was used to study the variation in distribution of the fatty acids at position sn-2 of milk fat triglycerides of a series of butters and of the milk obtained from a cow on a restricted feeding regimen. Selected samples were analysed for stereospecific distribution of their triglyceride fatty acids which were found to be esterified in a non-random manner. The percentage of a fatty acid at position sn-3 generally decreased with increase in the chain length of the acid; the reverse occurred at position sn-1. There was no major variation in the stereospecific distribution of fatty acids throughout the year; the variation that did occur was exhibited mainly by the medium chain length acids. Variation was greater at positions sn-1 and sn-3 than at position sn-2 and when the proportion of an acid varied at position sn-1 it usually varied at position sn-3 in the reverse manner.

For the milk samples it was found that change in triglyceride fatty acid composition was not associated with random increases or decreases of fatty acids at the 3 stereospecific positions. With changing triglyceride fatty acid composition (6:0, 8:0, 10:0, 12:0, 14:0, and 16:0 decreasing and 18:1 increasing) the percentage of 6:0, 8:0, 10:0, 12:0, 14:0 and 16:0 acids at position sn-3 decreased while the percentage of 18:0 and 18:1 acids increased. These changes were compensated for by changes in the opposite direction at positions sn-1 and sn-2.

Type
Original Articles
Information
Journal of Dairy Research , Volume 46 , Issue 1 , January 1979 , pp. 75 - 81
Copyright
Copyright © Proprietors of Journal of Dairy Research 1979

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References

REFERENCES

Brockerhoff, H. (1965). Journal of Lipid Research 6, 10.CrossRefGoogle Scholar
Christie, W. W. & Moore, J. H. (1969). Biochimica et Biophysica Acta 176, 445.CrossRefGoogle Scholar
Christie, W. W. & Moore, J. H. (1970). Biochimica et Biophysica Acta 210, 46.CrossRefGoogle Scholar
Hansen, R. P. & Shorland, F. B. (1952). Biochemical Journal 52, 207.CrossRefGoogle Scholar
Jack, E. L., Freeman, C. P., Smith, L. M. & Mickle, J. B. (1963). Journal of Dairy Science 46, 284.CrossRefGoogle Scholar
Jensen, R. G. & Sampugna, J. (1966). Journal of Dairy Science 49, 460.CrossRefGoogle Scholar
Jensen, R. G., Sampugna, J. & Pereira, R. L. (1964). Journal of Dairy Science 47, 727.CrossRefGoogle Scholar
Jones, E. A. (1969). Journal of Dairy Research 36, 145.CrossRefGoogle Scholar
Kinsella, J. E. & McCarthy, R. D. (1968). Biochimica et Biophysica Acta 164, 530.CrossRefGoogle Scholar
Kuksis, A., Marai, L. & Myher, J. J. (1973). Journal of the American Oil Chemists′ Society 50, 193.CrossRefGoogle Scholar
Luddy, F. E., Barford, R. A., Herb, S. F., Magidman, P. & Riemenschneider, R. W. (1964). Journal of the American Oil Chemists′ Society 41, 693CrossRefGoogle Scholar
Luick, J. R. & Smith, L. M. (1963). Journal of Dairy Science 46, 1251.CrossRefGoogle Scholar
Moore, J. L., Richardson, T. & Amundson, C. H. (1965). Journal of the American Oil Chemists′ Society 42, 796.CrossRefGoogle Scholar
Norris, G. E., Gray, I. K. & Dolby, R. M. (1973). Journal of Dairy Research 40, 311.CrossRefGoogle Scholar
Parodi, P. W. (1970). Australian Journal of Dairy Technology 25, 200.Google Scholar
Parodi, P. W. (1972). Australian Journal of Dairy Technology 27, 90.Google Scholar
Parodi, P. W. (1976). Journal of the American Oil Chemists′ Society 53, 530.CrossRefGoogle Scholar
Parodi, P. W. & Dunstan, R. J. (1971). Australian Journal of Dairy Technology 26, 29.Google Scholar
Patton, S. & McCarthy, R. D. (1963). Journal of Dairy Science 46, 916.CrossRefGoogle Scholar
Pitas, R. E., Sampugna, J. & Jensen, R. G. (1967). Journal of Dairy Science 50, 1332.CrossRefGoogle Scholar
Storry, J. E. (1970). Journal of Dairy Research 37, 139.CrossRefGoogle Scholar
Taylor, M. W. & Hawke, J. C. (1975). New Zealand Journal of Dairy Science & Technology 10, 49.Google Scholar
Yamamoto, Y., Tuchiya, F., Yonekubo, A. & Mizusawa, M. (1975). Japanese Journal of Zootechnical Science 46, 269.Google Scholar
Yurkowski, M. & Brockerhoff, H. (1966). Biochimica et Biophysica Acta 125, 55.CrossRefGoogle Scholar