FIG. 4.
Schematic representation of the pe38/polyhedrin hybrid promoter constructs used for in vitro transcription. The putative TATA motifs and the sequences of the early and late transcriptional start sites are boxed. The hybrid promoters are followed by the translational initiation codon of the CAT gene (ATGCAT) or polyhedrin gene (ATGph). (a) Arrows indicate early (E) and late/very late (L) transcriptional start sites, and the thickness of the arrows is proportional to the efficiency of initiation. (b) Arrows represent the inverted repeats; broken lines indicate the mutated sequences.