The Use of Adenovirus Dodecahedron in the Delivery of an Enzymatic Activity in the Cell

Figure 6

DAB staining of HeLa cells after 1 h of incubation at 37°C. (a) Observation using inverted phase contrast microscope (Leica) with 40x magnification of HeLa cells on the glass coverslips incubated with free HRP (1) or Pt-Dd HRP (2). (b) Observation of ultrathin sections of cells exposed to free peroxidase (1) or Pt-Dd HRP (2) examined in a Phillips CM12 electron microscope.

(a)

(b)