FIG. 3.

Phage inactivation by isolated LPS from strain 197N and the LPS-defective, phage-resistant insertion mutant AP82. Whole cells of strain 197N, assayed under similar conditions, are shown for comparison. LPS preparations or whole cells were diluted to give the amounts of KDO indicated and incubated with ca. 5 × 10⁷ PFU of Ba1c1, and the %PI was calculated after a 1 h of incubation (volumes were constant in all experiments). Vertical bars denote the standard error from a minimum of two separate experiments.