To construct an recombinant eukaryotic expression vector of pc DNA3. 1(+)-PF447-70-RGD,detect expression of targeting recombinant PF4 in eukaryotic cell and explore its biologic activity in vitro.A targeting recombinant PF4(platelet factor-4) eukaryotic expression vector was designed and constructed by cloning PF447-70-RGD c DNA into the pc DNA3. 1(+) vector,and was transferred by lipofectamine into CHO cell line. Then G418 was used to select table-transfected CHO cell line with PF447-70-RGD gene.The mRNA a...