The expression of the chiX and chiA genes exhibit a bimodal distribution. (A) Representative still frames of the JJH09 (ΔchiX::mKate) strain. The ΔchiX::mKate cells were chosen to represent the range of expression values observed. (B) Representative still frames of the chiA::gfp strain (FTG005). In each case, cells were grown for 16 h in rich media, and images were taken using a 100×, 1.4 NA lens (Olympus) and a camera (CoolSNAP HQ). Bars, 10 µm.