MPO and coronary artery disorder: Major evidence for MPO as enzymatic catalyst foroxidative modification of lipoproteins in the artery wall has been suggested ina number of studies performed with low-density lipoprotein [4].In contrast to low-density lipoprotein, plasma levels of high-densitylipoprotein (HDL)-cholesterol and apoAI, the major apolipoprotein of HDL,inversely correlate with the risk of developing coronary artery disease.