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Natural variations in the average size of bovine casein micelles: III. Studies on colostrum by electron by microscopy and light scattering

  • Brian E. Brooker (a1) and Carl Holt (a2)

Summary

Bovine casein micelles in pre- and post-partum colostrum have been characterized by both electron microscopy and light scattering. Attempts have been made to relate the changes in average micelle size to the partitioning of Ca and inorganic orthophosphate betwen the colloidal and aqueous phases. Pre-partum colostrum, and to a decreasing extent post-partum colostrum, contain casein micelles several microns in diameter. These giant micelles often contain closed cavities suggesting that they are formed by aggregation of particles comparable in size to normal casein micelles. Electron microscopy of mammary gland alveoli from nearterm pregnant heifers shows clear differences in average size between micelles immediately before and after secretion from Golgi vesicles. It appears that micelles aggregate in the alveolar lumen, possibly as a result of continuing co-precipitation of casein with Ca phosphate.

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Beery, K. E., Hood, L. F. & Patton, S. (1971). Journal of Dairy Science 54, 911.
Brooker, B. E. (1978). Journal of Dairy Research 45, 21.
Buchheim, W. & Welsch, U. (1973). Netherlands Milk and Dairy Journal 27, 163.
Carroll, R. J., Thompson, M. P. & Farrell, H. M. (1970). 28th Electron Microscope Society of America Proceedings p. 150.
Farrell, H. M. Jr & Thompson, M. P. (1971). Journal of Dairy Science 54, 1219.
Helminen, H. J. & Ericsson, J. L. E. (1968). Journal of Ultrastructure Research 25, 193.
Holt, C. (1975). Biochimica et Biophysica Acta 400, 293.
Holt, C. & Baird, L. (1978). Journal of Dairy Research 45, 339.
Holt, C., Kimber, A. M., Brooker, B. & Prentice, J. H. (1978 a). Journal of Colloid and Interface Science 45, in Press.
Holt, C. & Muir, D. D. (1978). Journal of Dairy Research 45, 347.
Holt, C., Muir, D. D. & Sweetsur, A. W. M. (1978 b). Journal of Dairy Research 45, 47.
Holt, C., Parker, T. G. & Dalgleish, D. G. (1975). Biochimica et Biophysica Acta 400, 283.

Natural variations in the average size of bovine casein micelles: III. Studies on colostrum by electron by microscopy and light scattering

  • Brian E. Brooker (a1) and Carl Holt (a2)

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