Heat map constructed by hierarchical cluster analysis. Red and green in the heat maps indicate up- and downregulation during oxLDL treatment, respectively. The left map includes 3196 genes expression levels of which were significantly altered by oxLDL treatment in at least one subset of macrophages. Genes in three clusters, denoted as A to C, were specifically upregulated only in one subset. There were 17, 72, and 28 annotated genes in cluster A, B, and C, respectively (right map).