Files in this Data Supplement:

• Supplemental file 1 - Fig. S1 (Diagrammatic representation of the different proviral PERV clones used.)
  Fig. S2 (Base frequency distribution of the primary DNA sequence at integration sites.)
  Fig. S3 (Distribution of genes linked to CpG islands according to expression level of the genes.)
  Fig. S4 (Effect of transcription activity on HIV integration frequency without or with weighting for CpG island-associated gene distribution.)
  Zipped JPEG file, 4.5MB.
• Supplemental file 2 - Supplemental figure legends
  MS Word document, 25K.
• Supplemental file 3 - Table S1 (Oligonucleotides used for LM-PCR.)
  Table S2 (Distribution of recombinant and wild-type PERV integrations in C8166 cells at days 2 and 15 postinfection.)
  Zipped MS Word document, 34K.