10.1371/journal.ppat.1003968.g008 Melvyn W. Yap Melvyn W. Yap Emily Colbeck Emily Colbeck Scott A. Ellis Scott A. Ellis Jonathan P. Stoye Jonathan P. Stoye Events in the evolution of the <i>Fv1</i> gene. Public Library of Science 2014 Evolutionary biology Evolutionary genetics genetics Gene function Genetic mutation microbiology Virology Viral transmission and infection Viral clearance Animal models of infection Viral replication Virulence factors and mechanisms Host-pathogen interaction 2014-03-06 04:29:56 Figure https://plos.figshare.com/articles/figure/_Events_in_the_evolution_of_the_Fv1_gene_/954592 <p>A phylogenetic tree showing the approximate times of <i>Fv1</i> acquisition and hypothetical virus infections leading to selection of new retroviral restriction activities. Colored mice indicate <i>Fv1</i> activity against at least one virus.</p>