FIGURE 5.

Topographical atomic force microscopy images of a thin (A) and a thick (B) Synechocystis pilus. Current maps of the thin (C) and the thick (D) Synechocystis pili shown in (A,B). The current map in (C) shows a zoomed in region of the thin pilus, approximated by the box in (A). Representative current versus time curves during probe approach and retraction over the pili (red) and over the Au substrate (black) for the thin (E) and thick (F) pili. Cross marks in the topographical images indicate the locations where the curves were measured over the pili (red) and over the Au substrates (black). The scale bars in (A,B,D) indicate 200 nm. The scale bar in (C) indicates 100 nm.