FIG. 1.

Genetic and transcriptional map of the 19.3-kbp linear phage φ29 DNA (adapted from reference 13). The main early promoters A2b, A2c, and C2 and late promoter A3 are boxed. The directions of transcription and lengths of the transcripts are indicated by arrows. The positions of genes are indicated with numbers. The early genes 6, 16.7, and 17, relevant for this work, are shown in bold. Note that whereas gene 6 is present in the early left-side operon, genes 17 and 16.7 are located in the early right-side operon. Black circles represent the terminal protein attached to the 5′ DNA ends. L and R indicate the left and right end of the φ29 genome, respectively.