FIG. 8.

Exogenous bacteriostatic activity. (A) Zone of clearance of BL21(DE3)/pLysS target cells grown in M9 medium with (a) cytoplasmic and (b) supernatant fractions of BSK1 cells after induction with mitomycin C. BL21(DE3)/pLysS target cells were also grown in M9 minimal medium containing iron and tested with (c) cytoplasmic and (d) supernatant fractions of mitomycin C-induced BSK4.3 cells. (B) Zone of clearance of (a) DH5α and (b) BL21(DE3)/pLysS target cells with supernatant of JC2 cells after induction with IPTG, (c) induced supernatant of M15 cells containing vector alone, and (d) buffer with BL21(DE3)/pLysS target cells.