One should point out that there were several previous large-scale initiatives to characterize human tissues and cells on a molecular level. For example, GTeX [1

One should point out that there were several previous large-scale initiatives to characterize human tissues and cells on a molecular level. For example, GTeX [1] provides gene expression profiles from 54 tissues. However, thanks to single-cell RNA sequencing, it is now possible to look at individual cell types. [1] https://gtexportal.org/home/ https://gtexportal.org/home/