X gene (HBx), enhancer II (Enh2) and basic core promoter (Bcp) of HBV in sera from HCC patients were amplified by nest PCR , and sequenced and then compared with the sequences in Genbank.

• 对HCC患者血清的HBV的HBx、Enh2与Bcp基因的巢式PCR产物直接测序，与Genbank中已发表序列进行对比分析。