Genomic analyses of Symbiomonas scintillans show no evidence for endosymbiotic bacteria but does reveal the presence of giant viruses. - Cho, Anna; Lax, Gordon; Livingston, Samuel J.; Masukagami, Yumiko; Naumova, Mariia; Millar, Olivia; Husnik, Filip; Keeling, Patrick J. (PLoS Genetics, 2024)