title: CPG-chromatography studies of the stability of casein micelles.
abstract: Casein micelles fractionated on controlled pore glass (CPG-10/3000) were shown to be stable by recycling experiments. Only minor effects on the size distribution of the casein micelles were found after heating skim-milk to 100 degrees C for 10 min, or freeze-drying skim-milk at -70 degrees C followed by resuspension in the synthetic milk serum of Jenness & Koops (1962). The heating caused some whey proteins (beta-lactoglobulin) to enter the micelle fractions while the freeze-drying caused some of the largest micelles to disrupt. In colloidal calcium phosphate-free skim-milk prepared according to Pyne & McGann (1960) all the micelles appeared to dissociate into monomeric caseins.
mesh_terms: D000818:Animals; D002364:Caseins / Q000302:isolation & purification; D002417:Cattle; D002850:Chromatography, Gel / Q000379:methods; D003102:Colloids; D004355:Drug Stability; D005260:Female; D005511:Food Handling; D005615:Freezing; D006358:Hot Temperature; D008823:Micelles; D008892:Milk / Q000737:chemistry
chemical_list: D002364:Caseins; D003102:Colloids; D008823:Micelles