Integration in active transcription units
From The HIV replication cycle a web-based interactive account
The preintegration complex then enters the nucleus and integrates into a chromosome of the host cell, most often within active transcription units. 
For review see: 
- Schroder ARW, Shinn P, Chen HM, Berry C, Ecker JR, Bushman F. 2002. HIV-1 integration in the human genome favors active genes and local hotspots. Cell 110: 521-529.
- Craigie R, Bushman FD. 2012. HIV DNA Integration, in HIV From Biology to Prevention and Treatment, pp. 59 Cold Spring Harbor Laboratory Press, Cold Spring Harbor.