MIT researchers have created a comprehensive functional map of human genes using CRISPR-based Perturb-seq technology, which ties each gene to its job in the cell. The data from this project is available for other scientists to use and has already led to new insights into gene function and regulation. The researchers used this method to explore the cellular effects of genes with unknown functions and to investigate the response of mitochondria to stress. The study has the potential to enable new analyses and discoveries in the field of biology.