[Determination of lecithin: cholesterol acyltransferase activity by a radioisotopic assay (author's transl)].

A method for determining Lecithin: Cholesterol Acyltransferase (LCAT) activity is presented. Trace amounts of labelled cholesterol are added to innactivated homologous substrate from a pool of normal serum. LCAT activity is determined measuring the cholesterol esterification, and is expressed as micrograms of cholesterol esters formed per milliliter plasma per hour. LCAT time-course, reproducibility, activity after serum storage at 4 degrees C, and normal values from 20 healthy subjects are studied.