Elevation of plasma L5 concentration in patients with STEMI. Fast-protein liquid chromatography analysis of LDL showing the content of each subfraction (L1-L5) in (A) normal control subjects with no cardiovascular risk factors and (B) patients with STEMI. The (C) L5% and (D) L5 plasma concentration ([L5]) for each subject is plotted. The line represents the mean of the group. The mean [L5] was significantly higher in STEMI patients (n = 30) than in control subjects (n = 30). ***P < .001, determined by using the Wilcoxon rank-sum test.