Studies on the interactions between purified bovine caseins and alkaline-earth-metal ions.
1. Alkaline-earth-metal cations at low concentrations form soluble complexes with bovine caseins. The relative order of binding capacities is: Mg(2+)>Ca(2+)>Ba(2+)>Sr(2+). 2. The cations interact with both free ionized carboxyl groups of aspartic acid and glutamic acid and with monoester phosphate groups covalently bound to serine and threonine; at low concentrations of the cations interactions are predominantly with the phosphate groups. 3. The order of binding capacities for purified components of the casein complex is: alpha(s1)-casein>beta-casein>kappa-casein.
D000818:Animals; D001224:Aspartic Acid; D001464:Barium; D002118:Calcium; D002127:Calcium Isotopes; D002364:Caseins; D002417:Cattle; D002848:Chromatography, DEAE-Cellulose; D003956:Dialysis; D004586:Electrophoresis; D005782:Gels; D005971:Glutamates; D008274:Magnesium; D010710:Phosphates; D011485:Protein Binding; D011868:Radioisotopes; D012694:Serine; D013213:Starch; D013324:Strontium; D013325:Strontium Isotopes; D013912:Threonine
D002127:Calcium Isotopes; D002364:Caseins; D005782:Gels; D005971:Glutamates; D010710:Phosphates; D011868:Radioisotopes; D013325:Strontium Isotopes; D001464:Barium; D013912:Threonine; D001224:Aspartic Acid; D012694:Serine; D013213:Starch; D008274:Magnesium; D002118:Calcium; D013324:Strontium