Fig. 1.
Schematic diagram showing the structure of the β-actin–Tat transgene. The Tat cDNA was placed under the transcriptional control of the chicken β-actin promoter. Transcriptional splicing and termination functions were provided by an SV40-derived 3′ UTR and polyadenylation signal. (▩), Chicken β-actin promoter; (▩), Tat cDNA.