... efficacy of the viral vectors was assessed with the use of GFP reporter. In the assay, cells were plated in24-well plates with a density of 105 cells per well the daybefore infection. Then the ... of many, if not all, mam-malian cells [16-20]. Among these peptides, the PTD of the Tat protein (PTDtat) of human immunodeficiencyviruses types 1 and 2 (HIV-1 and HIV-2) has been one of the ... incorporated the sequences encoding the PTDtat pep-tide into the 3' end of the Ad5 fiber gene, rescued the modified viruses, and characterized them in detail. Ourdata demonstrated that genetic...