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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: Cancer Lett. 2009 Feb 6;286(1):69–79. doi: 10.1016/j.canlet.2008.12.010

Fig. 1.

Fig. 1

Model of the HBV DNA genome as it exists in the virus particle. Note that the ends of the genome, at direct repeats 1 and 2 (DR1 and DR2), respectively, are both within the X region. Integration events into host DNA often occur in or around the DR1 sequences of HBV so that the X gene is the most frequent integrated portion of HBV DNA.