[Construction and application of lentivirus overexpression vector with two labeling genes fused with CopGFP and Puro].

To construct the lentivirus overexpression vector with two label genes fused with CopGFP and Puro and to detect the emission of green fluorescence as well as resistance to puromycin in liver cancer cells infected with lentivirus packaged with the above vector. Firstly, two fragments containing copGFP and Puro coding sequences were amplified from pCDH-CMV-MCS-copGFP and pLKO.1 respectively; secondly, the two amplified regions were fused with each other by recombinant PCR; thirdly, the fusion DNA fragment was cut and inserted into pCDH-CMV-MCS-copGFP vector, which was linearized with the same restriction endonuclease as used to digest fusion DNA fragment: BamH Ⅰ and Sal Ⅰ.