Establishment and application of co-transfection screening method for phytoestrogen active constituents Research on HBV DNA inhibition of plasmid acute infection mouse with betulinic acid Progress of Using Nanoparticles as Gene Vector Construction of Eukaryotic Expression Vector for Glypican-3 and Its Expression in Cell Construction of Eukaryotic Expression Vector for the CD151 and CD163 Receptor Proteins of Porcine Reproductive and Respiratory Syndrome Virus Effect of Overexpressed Exogenous Necdin on the Cell Proliferation of P19 Embryonal Carcinoma Cells Construction of GAL’s Eukaryotic Expression Vector and Targeting Expression of GAL in N-2a Cells