Retrovirus
Retrovirus est virus cum RNA, non DNA. Informatio genetica retroviri ergo transcribitur in DNA, si virus se multiplicat in cellula infecta. Est encymum nomine reverse transcriptase, quid transcriptionem fungitur. Post transcriptionem informatio virogenica continet, transcribitur in mRNA ut DNA alia.

Genera

Exogenuus 
Retrovirorum genera sunt:
 Genus Alpharetrovirus
 Genus Betaretrovirus
 Genus Gammaretrovirus
 Genus Deltaretrovirus
 Genus Epsilonretrovirus
 Genus Lentivirus; e.g.: Virus Immunitarii Defectus Humanae (VIDH)
 Genus Spumavirus

Endogenuus 
Endogenua retrovira tribus generibus discribuntur: 
 Classis I similis gammaretroviris
 Classis II similis betaretroviris et alpharetroviris
 Classis III similis spumaviris

Virus ARN
Virologia

Nexus externi 
 De retroviris in pagina National Center for Biotechnology Information

Genetica