Fig 2.

Stx production of STEC O104:H4 wild-type strains and C600 phage lysogens. Extinction values (OD₄₅₀) obtained by measuring serial dilutions of the six STEC O104:H4 wild-type strains (Table 1) and five E. coli K-12 lysogens (Table 3) by the Stx EIA. (A) ■, STEC wild-type strains listed in Table 1 grown in the presence of mitomycin C; □, STEC wild-type strains grown without mitomycin C induction. (B) ▲, C600 Stx phage lysogens grown in the presence of mitomycin C; △, C600 Stx phage lysogens grown without mitomycin C.