FIG. 4.

Lysis curves of representative mutants that have different phenotypes. P. espejiana BAL-31 cells were grown to a cell density of 6 × 10⁸ CFU/ml and infected with wt PM2 or an appropriate PM2 mutant using a multiplicity of infection of ∼10. Type 1, cells grew like cells infected with the wt (cyan); type 2, cells started to lyse ∼5 min earlier than the wt-infected cells (blue); type 3, cells started to lyse ∼5 min later than the wt-infected cells (green); type 4, cells started to lyse ∼10 min later than the wt-infected cells (magenta); type 5, cells showed delayed and incomplete lysis (red); type 6, cells were lysis deficient (light violet); type 7, cells showed abnormal lysis (yellow). p.i., postinfection.