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Maximum likelihood (ML) tree of the large terminase subunit of phages from the family Autographviridae and subfamily Studiervirinae. The midpoint rooted tree was inferred based on a ClustalW alignment of terminase large subunit (TerL) amino acid sequences from PRF-SP1, PRF-SP3, PRF-SP4, and PRF-SP5, and other closely related phage genomes available in GenBank. The bootstrap values (expressed as percentages) calculated from 1000 replicates are shown beside each node.
