What is apolipoprotein A-I (Apo-A1)?

Updated: Aug 02, 2019
  • Author: Georges Elhomsy, MD, ECNU, FACE; Chief Editor: Eric B Staros, MD  more...
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Apolipoprotein A-I (Apo-A1) is a structural and functional protein that constitutes approximately 70% of the protein in HDL.

Apo-A1 is produced in the liver and intestines and activates lecithin-cholesterol acyltransferase (LCAT) in the peripheral tissues, which transforms free cholesterol to cholesterol ester and facilitates its transportation to the liver, were it is degraded.

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