Electron micrograph of a HeLa cell pretreated with nocodazole and infected with wild type (wt) Ad2 in the presence of horse radish peroxidase for 15 min followed by a chase of 15 min in the absence of enzyme.  Modified from (1).

(1). Suomalainen, M., et al. (1999) J. Cell Biol 144: 657-672