FIG 7.

The spatially organized film on agar. Films develop on a bare LB agar surface from a small volume of prey lysate, with the same general features as those investigated on a filter membrane. However, as seen in the digital image, the film expands to a much larger surface area. Also, while the inset shows a contiguous inner yellow region, the main image shows concentric rings of inner and outer regions with an uncovered center where the initial deposition was spotted. The outer region displays fine structural features.