FIG. 1.

(A) Inactivation of bacteriophage K139.cm9 with purified LPS derived from V. cholerae O1 classical Inaba strain 569B (Sigma). The inhibition data represent the means ± the standard errors of three independent experiments. (B) SDS-PAGE pattern of purified LPS after silver staining. Strains used for LPS preparation for lanes were as follows: 1, 569B; 2, O395; 3, O395R-1; 4, MAK757; 5, P27459; 6, AI1838; 7, MO10; 8, Salmonella serovar Typhimurium. The inactivation of phage K139.cm9 was determined in plaque inhibition assays and is indicated as a percentage (mean values of at least two independent experiments); the first and second values in each set were obtained using 10 and 100 μg of purified LPS per ml, respectively.