To determine the origin of transcripts in cell types involved in atherosclerosis, we mapped the TSS using Rapid Amplification of cDNA Ends (RACE) in primary human macrophages, aortic endothelial cells (HAEC), monocytes and peripheral blood mononuclear cells (PBMC) depleted of CD14+ monocytes (Fig. 2A, Supplementary data 1). This evidence concerns the gene CD14 and atherosclerosis.