Electrophoresis analysis of RT-PCR product samplified from cDNA obtained from HCC and nontumorous liver tissues. M, DNA m arker (PGEM-7ZF(+)/Hae-III); T, tumor; N, nontumorous liver tissues. The positive bands of 417 bp, 490 bp, and 121 bp represent VEGF165, VEGF189, and β2-MG, respectively.