Alternative promoters in the development of bacteriophage plasmid P4 (original) (raw)

This study investigates the transcriptional patterns of bacteriophage plasmid P4 during its interaction with Escherichia coli in various states including the immunity integrated state, the nonimmune multicopy plasmid condition, and the lysogenic condition. Early phase transcription initiates from the PLEI promoter, while later transcription relies on the PLL promoter and is regulated by the P4 6 gene product. The differential transcriptional behavior suggests posttranscriptional regulation influences P4 immunity establishment, highlighting complexities in the P4 developmental cycle.