Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Theoretical molecular aspects of colloidal calcium phosphate in bovine milk

우유 속에 존재하는 칼슘과 인의 복합체에 대한 이론적인 분자학적 특성

  • Choi, Jong-Woo (Department of Food Science, The Pennsylvania State University)
  • 최종우 (펜실베니아 주립대학교 식품가공학과)
  • Received : 2011.07.26
  • Accepted : 2011.09.19
  • Published : 2011.09.30
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Abstract

A simplified model for the colloidal calcium phosphate (CCP) nanocluster was developed from an active role of phosphate in the precipitation of casein (CN)/Ca mixtures and the composition of casein micelles (CM). The possible shape of the CCP nanocluster was selected as a tetrahedron, and we estimated that 4 CN molecules were involved in crosslinking a single CCP nanocluster. Similar values were obtained for the number of CN molecules involved in stabilizing the nanocluster when the number of CNs attached onto each nanocluster surface was deduced from the composition of CM. If one phosphoserine cluster consisted of 3 phosphoserine residues, the theoretical molecular weight and volume for the nanocluster were estimated to be 4,898 g/mol and 2.88 $nm^3$, respectively. It was also shown that the position of Ca present in our model were reasonably located to accommodate the serine phosphate in CN molecule.

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References

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