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Phylogenetic tree of selected herpesvirus DNA polymerase gene fragments. Abbreviations: EHV-2, equine herpesvirus 2; HVS, herpesvirus saimiri; MHV68, murine herpesvirus 68; EBV, Epstein-Barr virus; HSV-1, herpes simplex virus type 1; CMV, human cytomegalovirus.
