Among other things found is the decrease in relative quantity of oxyhemoglobin (o-Hb) and relative ability of hemoglobin to isolate ligands for ischemic heart disease patients in comparison with healthy donors' indicators (by 28.9% and 46.5% for CA patients; by 40.7% and 37.9% for SA+HT patients, resp). This evidence concerns the gene GSTM1 and coronary artery disorder.