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|Noun||1.||alpha-lipoprotein - a lipoprotein that transports cholesterol in the blood; composed of a high proportion of protein and relatively little cholesterol; high levels are thought to be associated with decreased risk of coronary heart disease and atherosclerosis|
lipoprotein - a conjugated protein having a lipid component; the principal means for transporting lipids in the blood
HDL cholesterol - the cholesterol in high-density lipoproteins; the `good' cholesterol; a high level in the blood is thought to lower the risk of coronary artery disease