LagomorphaLemurLentivirusLentivirus InfectionsLentiviruses, Ovine-CaprineVisna-maedi virusInfectious Anemia Virus, EquineVisnaImmunodeficiency Virus, FelinePneumonia, Progressive Interstitial, of SheepArthritis-Encephalitis Virus, CaprineLentiviruses, PrimateLentiviruses, BovineGenetic VectorsTransduction, GeneticPumaEquine Infectious AnemiaFeline Acquired Immunodeficiency SyndromeGoatsCercopithecusLionsSimian immunodeficiency virusLentiviruses, FelineSheep DiseasesGoat DiseasesImmunodeficiency Virus, BovineHIV-1Gene Transfer TechniquesCatsSheepGenetic TherapyHorsesGenes, tatMolecular Sequence DataCell LineGreen Fluorescent ProteinsVirus ReplicationViral Envelope ProteinsGene Products, polGenes, polGenes, revGene Products, gagSimian Acquired Immunodeficiency SyndromeGene Products, envGenes, env