516309.fig.004a
(a)
516309.fig.004b
(b)
Figure 4: AFM images of (a) ferritin adsorbed without the TGA promoter (height scale = 30 nm) and (b) ferritin adsorbed in the presence of 0.05 mM TGA (height scale = 20 nm). The TGA promoter results in greater, more uniform coverage of the surface with ferritin. Scale bar is 250 nm for both images.