
Cover Genes interact in networks to orchestrate cellular processes. The illustration shows a gene coexpression network in humans. Since genes that are connected tend to be involved in similar processes, we can use gene coexpression networks to learn about the interactions and functions of genes, including those implicated in disease. (Cover illustration by Colleen McGarry and Renuka Nayak. [For details, see Nayak et al., pp. 1953–1962.])