Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-26T18:36:10.606Z Has data issue: false hasContentIssue false
  • English
  • Français

Comparative micelle structure: II. Structure and composition of casein micelles in ovine and caprine milk as compared with those in bovine milk

Published online by Cambridge University Press:  01 June 2009

B. C. Richardson ,
L. K. Creamer ,
K. N. Pearce  and
R. E. Munford
B. C. Richardson
Affiliation:
New Zealand Dairy Research Institute, Palmerston North, New Zealand
L. K. Creamer
Affiliation:
New Zealand Dairy Research Institute, Palmerston North, New Zealand
K. N. Pearce
Affiliation:
New Zealand Dairy Research Institute, Palmerston North, New Zealand
R. E. Munford
Affiliation:
Department of Physiology, Massey University, Palmerston North, New Zealand
Get access Rights & Permissions [Opens in a new window]

Summary

The casein micelles of sheep (Ovis aries), goat (Capra hircus) and cow (Bos taurus) milks have been examined by electron microscopy. The ovine micelles were smaller than bovine micelles, most being below 80 nm diam. The caprine micelles were either large (c. 200 nm diam.), easily sedimented and electron-dense, or small (below 80 nm) and similar to the ovine micelles. Examination of the micelles using the freeze-etch technique showed, however, that they were all composed of subunits of similar dimensions (10–15 nm diam.).

Electrophoresis of the caseins showed that there were differences between them, with the caprine casein containing a smaller proportion of its protein in the more mobile components. The mineral contents of the milks were also different, but these were apparently related to the different pH and casein contents of the milks. It is likely that the diiferences in micelle size distribution are determined by the physical and chemical properties of the casein components.

Type
Research Article
Information
Journal of Dairy Research , Volume 41 , Issue 2 , June 1974 , pp. 239 - 247
Copyright
Copyright © Proprietors of Journal of Dairy Research 1974

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Buchheim, W. & Welsch, U. (1973). Netherlands Milk and Dairy Journal 27, 163.Google Scholar
Chen, P. S. Jr, Toribara, T. Y. & Warner, H. (1956). Analytical Chemistry 28, 1756.CrossRefGoogle Scholar
Christianson, G., Jenness, R. & Coulter, S. T. (1954). Analytical Chemistry 26, 1923.CrossRefGoogle Scholar
Garnier, J. & Ribadeau-Dumas, B. (1970). Journal of Dairy Research 37, 493.CrossRefGoogle Scholar
Konar, A., Thomas, P. C. & Rook, J. A. F. (1971). Journal of Dairy Research 38, 333.CrossRefGoogle Scholar
Morr, C. V. (1967). Journal of Dairy Science 50, 1744.CrossRefGoogle Scholar
Nejim, H. T. (1963). Journal of Dairy Research 30, 81.CrossRefGoogle Scholar
O'Connor, P. & Fox, P. F. (1973). Netherlands Milk and Dairy Journal 27, 199.Google Scholar
Parry, R. M. Jr & Carroll, R. J. (1969). Biochimica et Biophysica Acta 194, 138.CrossRefGoogle Scholar
Pearce, K. N. (1972). Thesis, Massey University.Google Scholar
Pearce, K. N. & Creamer, L. K. (1974). Analytical Chemistry 46, 457.CrossRefGoogle Scholar
Richardson, B. C., Creamer, L. K. & Munford, R. E. (1973). Biochimica et Biophysica Acta 310, 111.CrossRefGoogle Scholar
Rook, J. A. F. & Campling, R. C. (1965). Journal of Dairy Research 32, 45.CrossRefGoogle Scholar
Rose, D. (1969). Dairy Science Abstracts 31, 171.Google Scholar
Schmidt, D. G. & Buchheim, W. (1970). Milchwissenschaft 25, 596.Google Scholar
Schmidt, D. G., Walstra, P. & Buchheim, W. (1973). Netherlands Milk and Dairy Journal 27, 128.Google Scholar
Shimmin, P. D. & Hill, R. D. (1964). Journal of Dairy Research 31, 121.CrossRefGoogle Scholar
Shimmin, P. D. & Hill, R. D. (1965). Australian Journal of Dairy Technology 20, 119.Google Scholar
Thompson, M. P., Boswell, R. T., Martin, V., Jenness, R. & Kiddy, C. A. (1969). Journal of Dairy Science 52, 796.CrossRefGoogle Scholar
Thompson, M. P., Kiddy, C. A., Johnston, J. O. & Weinberg, R. M. (1964). Journal of Dairy Science 47, 378.CrossRefGoogle Scholar
van Kreveld, A. & van Minnen, G. (1955). Netherlands Milk and Dairy Journal 9, 1.Google Scholar
Waugh, D. F., Creamer, L. K., Slattery, C. W. & Dresdner, G. W. (1970). Biochemistry 9, 786.CrossRefGoogle Scholar
Waugh, D. F. & Noble, R. W. Jr (1965). Journal of the American Chemical Society 87, 2246.CrossRefGoogle Scholar
Waugh, D. F., Slattery, C. W. & Creamer, L. K. (1971). Biochemistry 10, 817.CrossRefGoogle Scholar