FIG. 4.
Expression of GFP in filamentous and single cells. Filamentous cells (A and B) were obtained by growing the mutant with gfp::Kmr inserted (SGK01) in 0.1% NB, and single cells (C and D) were obtained by culturing the same mutant on 1.0% NB agar plates. (A and C) Phase-contrast micrographs; (B and D) GFP fluorescence emitted by the cells in panels A and C, respectively.