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Mosaicism of gene cassettes among dsDNA-tailed bacteriophages. Genes in cassettes bearing homologous genes are coordinately colored; striped genes indicate that protein products perform analogous functions. The sequences for bacteriophages N15 (112), λ (116), HK97 (70), and Mu (94) were obtained from public databases; the SfV sequence (3) was kindly provided by N. Verma prior to publication.
