studies were made on the disposition of mineral ions in matrix vesicles ( mv ) and their relationship to alkaline phosphatase by treatment of mv-enriched microsomes ( mvem ) with graded levels of ca2+-chelating agents to complex accessible ions , fractionation of mvem on hypertonic sucrose gradients at two different ph values ( 7.5 and 8.0 ) to evaluate for the presence of calcium phosphate mineral , and passage of mvem through cation-exchange columns to determine the accessibility of the ca2+ .
C0022023
ions
C0007447
cation