Characterization of preearly genes in the terminal repetition of bacteriophage BF23 DNA by nucleotide sequencing and restriction mapping.

A finer restriction map of the terminal repetition of bacteriophage BF23 DNA was determined and used to localize a 3.4-kbp deletion in the terminal repetition and to determine the physical location of preearly gene A2-A3. The nucleotide sequence of gene A2-A3 was determined and shown to code for a protein of 125 amino acids with no indication of a membrane transport sequence. The beginning of an adjacent gene, probably gene A1, was also sequenced.