SiphoviridaeStreptococcus PhagesMyoviridaeCaudoviralesProphagesBacteriophagesGenome, ViralViral Tail ProteinsPodoviridaeLactococcusLysogenyHost SpecificityLactococcus lactisStaphylococcus PhagesOpen Reading FramesGene OrderMicroscopy, Electron, TransmissionMolecular Sequence DataSequence Analysis, DNADNA, ViralViral ProteinsVirionPhylogeny