COL4A1 and atherosclerosis: Additionally, a cell population co-expressing contractile genes with key ECM genes (Col1a1, Mgp, Eln, Fn1, Col4a1, and Col8a1) and Notch3, mapped together with the fcVSMC population from the atherosclerosis dataset (I-cluster 6; Figure 3A and B; Supplementary material online, Figure S3).