Biosciences researchers performed hundreds of genome-wide fitness assays on Bacteroides thetaiotaomicron and identified new functions for 40 proteins, including antibiotic tolerance, polysaccharide degradation, and colonization of the GI tract in germ-free mice. https://biosciences.lbl.gov/2021/03/08/new-protein-functions-from-beneficial-human-gut-bacterium/