Abstract
The influence of the isolated α s1-,β- and gK-casein on the precipitation of brushite (DCPD) and octacalcium phosphate (OCP) at relatively low pH of 6.1 and 6.15 was studied under constant pH conditions. All caseins show a strong retarding effect on the kinetics of crystal formation. The individual α s1- and β-caseins induce extensive formation of DCPD at the cost of OCP, whereas in the presence of ϰ-casein the amount of this precursor phase is declining. Combined effects of selective adsorption onto DCPD surfaces specifically and induced aggregation of DCPD crystals in the presence of α s1- and β-casein, but not in the presence of ϰ-casein are considered as a possible explanation. Aggregation of colloidal calcium phosphate clusters is suggested to be of importance in the stability of the casein micelles of bovine milk.
Published Version
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