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Position of the four Micromonas polaris viruses (MpoVs) (in bold) in a maximum likelihood dendrogram (100 bootstrap replicates), based on a multiple alignment of 178 amino acid positions of DNA polymerase B (polB). Only nodes with bootstrap values >50% are displayed. Virus strains and accession numbers are indicated. “Contigs” are polB sequences extracted from an Arctic marine metagenome [22]. The tree was rooted using polB sequences of Bathycoccus viruses.
