Determination of lecithin: cholesterol acyltransferase activity by a radioisotopic assay

Abstract
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.
Keywords:
Acyltransferases/blood, Carbon Radioisotopes, Cholesterol/blood, Esterification, Humans, Methods, Phosphatidylcholine-Sterol O-Acyltransferase/blood
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