KARS1 and infection: Assessment of the number of phage particles produced during infection showed that OG1RF_10820-Tn (lytR), cscK-Tn, and OG1RF_12241-Tn (lysR) strains produced 10-fold lower phage particles than the wild-type strain (Fig. 2C), indicating that the Tn mutants have a defect in phage burst size.