Characterization of Niemann-Pick C1-Like 1 (NPC1L1)-dependent very low-density lipoprotein and low-density lipoprotein (VLDL/LDL) particles in Npc1l1WT or Npc1l1KO mice. (A) Cholesterol and (B) triglyceride concentrations in lipoprotein fractions, and (C) protein score, which reflects protein abundance and degree of confidence in protein identification, of apoM in VLDL/LDL fractions, collected from Npc1l1WT or Npc1l1KO male mice (initially 8–10 weeks old) fed a Western diet (WD) for the indicated periods in the absence (−) or presence (+) of ezetimibe (Eze). Representative lipoprotein profiles from two independent experiments with two mice in each group are shown. Bar graphs represent the mean ± S.D. Each dot on the bar graphs represents data from a single mouse (n = 3–4). * p < 0.05; ** p < 0.01, significant difference by Dunnett’s test compared with Npc1l1WT Eze (−) mice.