Abstract
Bacteriophage SPO1 gene 27, whose product is required for late gene transcription and DNA replication, has been cloned in Escherichia coli, and its complete nucleotide sequence has been determined. We infer that the product of gene 27 is a highly basic 17,518-dalton protein of 155 amino acids. The gene for this regulatory protein is transcribed from two promoters: an early promoter situated before the adjacent upstream gene 28 and a middle promoter located between genes 28 and 27.
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