FIG. 1.

ORFs and sequence similarity regions in P22 DNA. The ORFs for which no genetic designation had been made previously are labeled based upon the number of amino acid residues (e.g., ORF-80 would encode a protein with 80 amino acids). The striped and open boxes correspond to regions which have nucleic acid sequence similar to S. paratyphi A or coliphage λ DNA, respectively.