FIG. 3.

(A) Comparison of the ORF49, ORF269, and ORF235 amino acid sequences from L. lactis phages BK5-T, φ31.1, and ul36.1, respectively. The asterisks indicate identical amino acid residues and the periods indicate residues conserved across all three sequences. Amino acid residues within the putative helix-turn-helix DNA binding motif and the longest direct repeat sequence are indicated by the shaded regions and in bold, respectively. The positions of the four repeat sequences (and their designations) found in all three ORFs are indicated by the horizontal lines with matching arrowheads. (B) The nucleotide sequences of the repeat sequences (DR1 to DR3 and IR1) in BK5-T orf49 are shown in the top strand. The sequence below represents the homologous region from orf235 and orf269 from L. lactis phages ul36.1 and φ31.1, respectively, which are identical. The colons indicate identical nucleotides between BK5-T orf49 and the other L. lactis phage sequences. The nucleotide positions of the four repeat sequences (DR1 to DR3 and IR1) in BK5-T are indicated by the corresponding arrows underneath the repeat label.